I remember it like: initial thing he got famous for was misunderstanding a Canadian bill dealing with discrimination. One of his students had transitioned part way through the class and Peterson continued to deadname her and use the wrong pronouns. Student filed with the school for harassment. Peterson refused to use the student's preferred pronouns, saying that any attempt to coerce him into doing so was evil Marxist commie tyranny. Chuds had a field day with him, comparing him to Rosa Parks.