Abu Muslim al-Khurasani

Abu Muslim Abd al-Rahman ibn Muslim al-Khurasani (Persian: ابومسلم عبدالرحمان بن مسلم خراسانی‎) or Behzādān Pour Vandād Hormozd (بهزادان پور ونداد هرمزد) born 718/19 or 723/27, died in 755), was a Persian general in service of the Abbasid dynasty, who led the Abbasid Revolution that toppled the Umayyad dynasty.

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Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 10 months ago

Abu Muslim al Khurasani (born around 100 Hijri and killed around 138 or 129 Hijri). was a famous army leader and politician who played big role in the establishment of the Abbaside Government. He was calling Muslim masses to leave Bani Ummaya and give allegiance to Bani Al Abbas. 
Abu Muslim al Khurasani was serving Bani Al Abbas in every Possible way. He offered Imam Jafar As-Sadiq (a.s.) to be the head of the state. But Imam Jafar As-Sadiq (a.s.) who knew the political nature of the offer, rejected the offer.  The famous reply from Imam to the letter which Abu Muslim al Khurasani sent to the Imam stated that : You are not from my people and the time is not my time. 
Abu Muslim al Khurasani made the first King, Caliph, of Bani Abbas  who was Abul Abbas Al Saffaah. But he was killed by the Abbasi Government itself which he served because of the brother of Al Saffaah ( Abu Ja;far al Mansur) became unhappy with him and killed him.
It is clear for us that Abu  Muslim al Khurasani was not from the Shia of Ahlulbayt (a.s.) because Imam Jafar Al-Sadiq (a.s.) replied him “La Antaman Rejali Walal Zamanu Zamani”  You are not from my people and the time is not my time.(Al-Milal WAL-Nihal by  Shahrestani).1:142.
Many of the followers of Bani Ummaya accused Abu Muslim al Khurasani with very bad things.  Because of their feelings towards Bani Ummaya and against Bani Al-Abbas. For us both rulers from Bani Ummaya and Bani Abbas did very wrong and also Abu Muslim al Khurasani for us  was just a man who supported the politics of Abbaside Government and he was not from the Shias of Ahlulbayt (a.s.)
 Wassalam.