2. Has Moldbug actually self-identified as a Nazi? He has offensive views to many, to be sure, but Nazi is much more specific, and to me, a weird way to interpret what he writes. I'm not saying you're wrong, I'm saying that what you call "Nazi" I would call "disgusting, wrong, and troubling." The fact we don't agree on what precisely he is - even if we both dislike him - is one reason why we should not ban him. Especially since on other people we might not agree on who to ban (e.g. some consider abortion doctors to be literal murderers; should they ban such doctors from a programming conference?).
3. About the diversity situation in tech: the article mentions how another industry, medicine, handles this kind of thing. LambdaConf's decision is the default in that industry. In fact, in practically all industries. Yes the gender difference in tech is larger than in medicine. That is inconsistent with your claim.