Ali R.A was going to marry Abu Jahal’s daughter. The key word “Abu Jahal”. The enemy of Prophet Muhammed Sallahu Allahe Wasallam. Therefore kindly shut your big mouth about the history of Islam if you don’t know any. Secondly, your fatwa isn’t valid and hold no position in respective of the evidence given by Retaliator. Lastly, there is a hadith:
It is narrated on the authority of Abu Abdullah Jafar Al-Sadiq: A miserable of the miserables came to Fatima, the daughter of the Messenger of Allah, and said to her: “Did you not know that Ali proposed to marry (Khataba) the daughter of Abu Jahl?” She said: “Is it true what you say? He said three times: “What I say is true.” Jealousy entered into her (heart) to an extent she could not control, for Allah has ordained that women be jealous and that men perform Jihad, and He has made the reward of the patient (woman) similar to that of the Murabit and Muhajir in the way of Allah.