Salam, please don't get me wrong, don't be offended, don't change this into a debate, don't change ...?

Well due to the research this event really happened. I read opinions of others. It is declared that Omar was a close person to the prophet and Fatima was his daughter too. It is said that the prophet knew the future and was sad to know all the future happenings that a khalife would be elected by mortals instead of the one elected by God and messaged to the prophet!