In today's post about rule one holocaust denial is specifically mentioned as an example of bigotry which will not be tolerated. Holocaust denial is undoubtedly reprehensible and exemplifies the broader consequences of anti intellectualism. That being said where does holocaust denial come from and what were their objectives?
This older post from u/commiespaceinvader covers the history in quite a lot of detail, the FAQ section on denialism also has a number of relevant links.