Sunni-Shi'a

1. The Prophet Muhammad (SAWA) has ordered us to do so as it clear in the Hadeeth : When you say Laa ELAAHA Illallah, Muhammad Rasoolullah, say : :Ali Ameerul Mo'mineen. (Kitab Al-Ehtijaj, page 158).

2. Hadeeth of the Prophet (SAWA): When I was elevated to the Sky, I saw writing on the Throne العرش : LAA ELAAHA ILLALLAH, MUHAMMAD RASOOLULLAH, AYYADTOHO BI ALI لا إله إلا الله محمد رسول الله، أيّدتُهُ بِعليّ

This Hadeeth was narrated not only in Shia books but also in many Sunni books e.g. Al-Manaaqib by Ibn Al-Maghazili, page 93, Al-Shaafi by Qadhi E'yaadh 138, Al-Durr Al-Manthour by Al-Soyooti  4:153, Al-Khasaa'is Al-Khubra by Al-Soyooti 1:7.

3. Hadeeth narrated by Abdullah Ibn Mas'ood from the Prophet Muhammad (SAWA): An angle came to me saying : O Muhammad, ask the previous prophets and messengers who were been sent before you; what was their message? I asked him: What was their message? He said: They were been sent on following your message and following Ali Ibn Abi Talib. ( Ma'rifat 'Oloom Al-Hadeeth by the wellknown Sunni imam al-Haakim Al-Nisaburi , p. 96).

4. Hadeeth of the Prophet to Ali: I asked Allah to keep your name with my name whenever I will be mentioned, and He granted me that.( Kanzul Ommal 13:113).

5. After the Prophetic announcement of Al-Ghadeer ( For whom I am the master, Ali is his master), Athaan (Azaan) was declared with Ashhadu Anna Aliyyan Ameerul Mo'mineen)  (Al-Salaafah Fi Tareekh Al-Khilafah by the Egyptian Sunni Alim Al-Maraaghi, page 36 and 38.

Wassalam.

Sincere servants of Allah who are really after the truth, are always attracted to the truth by many ways. Allah (SWT) says in Quran : Those who strive for Our sake, We will guide them to Our way.(Sura 29, verse 69).

It is a big bounty from Allah on you to be attracted to know more about Shia Islam because it is the original Islam of the Prophet and Ahlul Bayt (AS). Keep on thanking Allah for His bounties.

Knowing more about real Islam will make you more near to the truth. You will be then helping yourself to gain the Paradise and be with the Prophet (SAWA) and his Progeny Ahlul Bayt (AS).

There are many useful websites which might help in getting more information in this regard e,g, www.Islam.org, www.rafed.net, www.Al-Shia.org, www.shiasearch.org and many other useful websites.

Wassalam.

Allah (SWT) knows the intentions in the hearts. We can not take political propaganda as the real intention. Those rulers who opposed the Holy Progeny of the Prophet (SAWA) can not be trusted as their behaviour against the orders of the Prophet speak about them. If they were after spreading Islam not expanding their rule, they should have practiced Islam in their own life.

Wassalam.

You don't need to belong to any group nor to make a proclamation before any one to become a Shia. Shia Islam is the original Islam of the Prophet Muhammad (SAWA) and his Progeny (Ahlul Bayt)(AS).When you believe in the divine leadership of Ahlul Bayt (Imam Ali and the 11 infallible Imams) after the Prophet, you are a Shia Muslim.

Wassalam.

Muslim married man is not allowed to go for Mut'ah marriage with a woman from People of Book (Christian, Joe, Magi) but after permission from his Muslim wife.

Wassalam.

Compiling or writing books was not common during that period. No books were compiled during the time of previous prophets as well simply because people at that time did not have the practice of writing books. Nevertheless, the most important facts are documented and mentioned in Quran and in the authentic Hadeeths from the Prophet (SAWA) and Ahlul Bayt (AS). Aftermath the passing away of the Prophet, there were few books like Kitab Sulaym ibn Qays, which has many historic facts about that period.

Wassalam.

1. Folding hands in Salah
The Practice of folding hands in the Salah was never done by the Prophet (SAWA) but has come after his time from those who are away from Ahlulbayt (a.s.). The authentic Hadeeths from the Prophet regarding performing the Salah never mentioned folding his hands, that’s why you find in Saheeh Al-Bukhari the only narration in this regard from Sahl Ibn Sa’ad stating that in his time which was after the Prophet, (People were ordered to fold their hands). (People were ordered to fold their hands) means that the order was from the Government, otherwise no need to order people to fold their hands if the Prophet himself did fold His hands anytime. Folding hands was started by Umar Ibn Al-Khattab after the prisoner of war were brought from Persia to Madina, and they folded their hands in front of him. That was according to their customs of showing respect in their Custom and Magi worship. Umar liked that practice and ordered people to do it during the Salah. The order of Ummar to fold hands in Salah was rejected by the main pious companions and mainly by Ameerul Momeneen Ali (a.s.) who was openly saying “Open your hands in Salah and never resemble the Non-Muslims. 
Even Sunni Scholars are not united in the matter of folding hands during Salah. The well known Sunni Sect “Maliki” which was established by Malik Ibn Anas, don’t fold their hands. The other 3 Sunni Sects; Hanafi, Shafi’ee and Hanbali, none of them said that folding hands is obligatory in Salah. The famous Sunni Scholar from Al-Azhar Shaikh Sayyed Sabiq in his encyclopaedia which is called Fiqh Al-Sunnah, stated that: We don’t have even one single authentic Hadeeth  which states that the Prophet ever folded his hands during Salah. 
Many Sunni important books stated that the well known companions Sahaba  and followers of companions Tabi’een, used to pray opening their hands. Abdullah bin Al-Zubair used to open his hands in Salah.(Al-Majmuah Fi Sharh Al-Mohaddab, Volume 3 Page 311). Also Ibrahim Al-Najha’ee النخعي and Ibn Sirin and Layth Ibn Saad used to open their hands in Salah as it is mentioned in the same book Al-Majmuah Fi Sharh Al-Mohaddab, Volume 3 Page 311. 
We have authentic Hadeeths from Ahlulbayt (a.s.) e.g. from Imam Mohammad Al- Baqir (a.s.) telling people not to fold their hands in Salah “لا تُكَفِّر ، إنما يصنع ذلك المجوس Never fold your hands in Salah,that is the act of their Majoos (Majis). Also in the famous Hadeeth known by Hadeeth  Al-Arbamiya which included 400 teachings, Ameerul Mo’mineen saidلا يجمع المسلم يديه في صلاة  “La Yajma al Muslim Yadaihi Fi Salat” The Muslim should not fold his hands during Salah.
because it is the practise of the Majoos and he said that the Muslim should not resemble the Non-Muslims in his worship. In the well known Sunni book Al Mughni by Ibn Qudama, he stated clearly that many of the well known Sahaba and Taabi’een never folded their hands in Salah. He mentioned that Ibn al-Zubayr never folded his hands in Salah also mentioned that Malik never folded his hands in Salah. Al-Mussannaf by Ibn Abi Shaibah mentioned in a separate chapter in his book those prominent Sunni personalities who never folded their hands in Salah. He mentioned that Al Hasan and Mugheera and Ibrahim they used to pray Salah opening their hands. (Hadeeth No. 3970 in Al-Musannif by Ibn Shayeba). In Hadeeth No. 3971, he stated that Abdullah Ibn Al-Zaubayr always used to pray his Salah opening his hands. In Hadeeth No. 3973 he stated that the narration from Abdullah Ibn Yazid who said I have never seen Ibn Al-Musayyab folding his hands in his Salah and he was always opening his hands during praying. Also in the same book (Al Musannif by Ibn Al-Shayeba Hadis No. 3974 ) a narrating from Yahya Ibn Saeed who is one of the very famous Ulama of Sunnis in Hadeeth, from Abdullah Ibn Al-Ayezaar who said: I was performing Tawaf with Saeed Ibn Jubayr who saw a man praying and putting his hand on the other hand, means folding his hands. Saeed Ibn Jubayr immediately went to that man and opened his hands, then came back to Tawaf. 
This is few examples from the Sunni Books that folding hands is not the Sunnah of Prophet. There is also Hadeeth in Al-Mussannaf by Ibn Shayeba “Kitaab As-Salat” Volume 1 Page 427. The Hadeeth is from the Prophet (s.a.w.a) informing the Muslims that (I can see the Monks of the Jews folding their hands during the Salah). This is clear that folding the hands is not the practise of the Prophet or His followers but the practice of others. Obviously, it was taken from some Muslim rulers from others and ordered Muslim masses to do it as you read in Bukhari ( People were ordered to fold their hands in Salaah)(Bukhari, 1:135).

2.Takbeer after Salah
The authentic evidence from Ahlulbayt (a.s.) and from others stated that the Prophet Muhammad Peace be upon Him and His Holy Progeny used to end every Salah by saying Allah Hu Akbar three times. It is in Bukhaari in the chapter of الذكر بعد الصلاة aHadeeth narrated from Ibn Abbas stating that the Prophet used to raise His voice by Takbeer at the end of the obligatory Salah. Ibn Abbas also said that we used to know the end of the Salah by hearing the Prophet saying Allah hu Akbar 3 times that is in Volume 1 Page 204 in Bukhaari and in Sahih Muslim Volume 2 Page 91 & 92. And in Sunan Abi Dawood Volume 1 Page 226 in Bab Al-Takbeer Ba’d asSalah. Shafi’ee in his Musnad narrated from Ibn Abbas that:  We used to know the end of the Salah by hearing the Prophet saying Takbeer 3 times. In Musnad Ahmad Ibn Hanbal narrating from Ibn Abbas theHadeeth that I did not know the end of the Salah but only by hearing the Prophet saying 3 times Allahu Akbar. Ibn Hajar Al-Asqalani in Fath Al-Bari, mentioned that this Hadeeth means that after Salah it is important to say 3 times Allah Hu Akbar. 
Al Tabari mentioned that the Prophet used to say 3 times Allahu Akbar after Salah. Ibn Maaja in his Sunan Volume 1 Page 280 mentioned that the Prophet used to raise his hands and after very Salah and say Allah Hu Akbar. Al-Tabaraani in Al-Mojam al-Awsat , volume 9 , Page 105 narrated from Qutada: I asked Anus Ibn Malik to show us how the Salah/Prayer/Namaz of the Prophet was? Anas stood and prayed the Salah and he finished the Salah with the Takbeer . He was teaching them the Salah of the Prophet. We also have the same evidence in Musnad Al-Humaidi Volume 2 Page 277 and the narration is from Abdullah Ibn Umar that he saw someone praying Salah and not saying Takbeer, Abdullah Ibn Umar got angry on him and throw him with a small stone telling him to raise his hands and say Takbeer Allahu Akbar. We have also in the book of Al-Tamheed by Ibn Abd Al Bar Volume 19 Page 134 that the Takbeer 3 times is a part of the Salah. I will end with al-Albani who is well known Wahabi Shaikh who mentioned in his book Itmam Al Minnah إتمام المنة Page 172 that raising the hands with Takbeer has been narrated  in authentic Hadeeths from the Prophet that he used to raise his hands and say Allahu Akbar.  
Wassalam.
 

Yes. We are encouraged by Ahlul Bayt (AS) to pray in any Masjid and with Muslims of any sect.

Wassalam.

The attack on the door of Fatima (s.a.) and setting fire to burn her door and her house has been mentioned in many authentic and prominent Sunni books as well as Shia books. From the Sunni books where you can find this attack has been mentioned is:
    1.    Al-Imamah Wal Siyasa by Ibn Qutaibah , Volume 1 Page 30. الإمامة والسياسة لابن قتيبة .
    2.    Al-Mukhtasar Fi Akhbaar Al-Bashar المختصر في أخبار البشر Volume 1 Page 156 by Abul Fida Ismael.
    3.     Tareekh Al-Tabari by Volume 3 Page 198. 
    4.     Ansaab Al-Ashraaf by Al-Balathuri أنساب الأشراف للبلاذري Volume 1 Page 586.
    5.    Al-Milal Wal Nihal narrating from Al-Nadhdham Volume 1 Page 56. 
    6.    Al-Iqd Al-Fareed by Ibn Abd Rabbeh Volume 5 Page 12. 
    7.    Tareekh al-Ya’qoubi, V.2, P.126.
    8.    Al-Bad’ WAL-Tareekh by al-Maqdisi, 5:151.
    9.    Al-Kaamil fil Tareekh by Ibn al-Atheer, 2:325.
    10.    Al-Mussannaf by Ibn Shaibah, 8:572.
    11.    Al-Estee’aab by Ibn Abd al-Birr, 1:298.
    12.    Al-Waafi bil Wafayaat  by al-Safadi, 2:227.
    13.    It is narrated in many prominent Sunni books that Abu Bakr when he was about to die, did mention that he committed three things in his life he wished that he never did any of them. One of them is his attacking the house of Fatima (s.a.). This statement of Abu Bakr confirms the attack on the house of Fatimah and it is narrated in many Sunni books like:
    14.    Mizaan al-E’tidaal by Al-Dhahabi, Volume 2 Page 215. 
    15.    In Kanzul Ummal , Volume 5 Page 631. 
    16.    In Lisaan Al-Mizaan by Al-Asqalani Volume 4 Page 219. 
    17.    In Murooj Al-Dhahab, Volume 2 Page 301. 
    18.    In Al-Imamah Was-Siyasah by Ibn Qutaiba Volume 1 Page 18 
    19.    and In Tareeq Al-Tabarri Volume 2 Page 619.  
   All these Sunni references and many others prove that the attack on the house of Fatima did happen and her door was burnt by the attackers.
Wassalam.