University of Tehran professor Seyed Mohammad Marandi told lawyer Alan Dershowitz, whose clients have included O.J. Simpson and Donald Trump, that he is a “Nazi” while discussing the American war waged against Iran on Piers Morgan Uncensored Thursday. The conversation between the men was contentious throughout, and became especially inflammatory near the 30-minute mark. “Will you at least admit that Iran murdered, in cold blood, as many as 50,00…