I know the one you mean. He's one of the reasons I consider "left wing" and "someone you'd want to go drinking with" are mutually exclusive terms, and knowing what I do about his politics, I would not put it past him to be one of those people making baseless accusations, deciding that everyone involved is an actual Holocaust participant without ever having deigned to make conversation with anyone there.

Whatever happened, he did not, and presumably was not allowed to interfere with the proceedings.