I think it’s reasonable to ask a poster to modify ‘forum legal’ behavior to help avoid a problem. If the OP continues to make personal comments in violation of my instruction, he’ll be noted or warned for that. I’m not asking you to take responsibility for what someone else posts, and I didn’t ask you to stop disputing the points the OP made. After reading your comment “Not that the whole ‘A Jewish girl didn’t want to go out with me because I’m not Jewish, that elitist racist!’ isn’t interesting,” I said this: