Belazari has written in his book, Ansab ol Ashraaf: Osman said to Ammar Yaser: O the remaining of your fathers penis. (Ansab ol Ashraaf, part 2, p.277)
Do you think that it is correct the Muslims caliph says such a thing, and the worse thing is to a person like Ammar Yaser who is one of the greatest followers of the Prophet (peace be upon him and his relatives). While the Prophet (peace be upon him and his relatives) said many great sayings about Ammar Yaser, for example, Motaghi Hendi has quoted some narrations in his book, Kanz-ol-Omal, one of them is: Ammar is with right and right is with Ammar. (Kanz-ol-Omal, v.13, p.538539)
Are the people like Osman who cannot control themselves when they are angry and they curse even to the Prophets (peace be upon him and his relatives) followers, suitable for being the caliph of Muslim and replace instead of the Prophet (peace be upon him and his relatives) who is bless to all worlds?!