Okay, so it was filthy, ahlay biddah, rafidha, Iranian majoos named Abu LuLu who killed Umar. Who killed Uthman then? and Ayesha? and Ammar B Yasir? and Abuzar Ghaffari? and Mohammad b Abi Bakr? and Imam Ali, Hasan, Hussein, Ali Ibn Hussein.....? and who took the Prophets' family hostage? and who assembled army to lead the first internal war within the Muslims that resulted in death of 10,000 Muslims? and who led the seconed? and who persistently disobeyed the Khalifa of the time? who were all those hypocrites in the close company of the Prophet that the Quran talks about?.......hmmm, must be those majoosi, ahlay biddah, rafidha Iranians.
you question is offtopic and correct answer from authentic history
these all killed by sabaties (followers of abdullah bin sabah they jew).