1. This is very wrong way of thinking which goes too far from the real meaning of forgiveness. The Quranic Verse states : ( Allah accepts only the repentance of those who do wrong in ignorance and repent soon afterwards) Sura An Nisa , Verse 17.
2. Sinful acts on others will not be forgiven by Allah, unless and until the victims forgive the sinners. There is no question in harming others and seeking forgiveness before returning their rights and making them forgive you from their hearts.
3. Allah does not forgive those who intend to repeat the sin again because of the fact that one of the conditions of forgiveness is to decide not to commit the sin again.
May Allah protect us from sinful acts and forgive us and all the believers , by the Waseela of His Most beloved servants Mohammad and his Holy Progeny Ahlul Bayt (AS).