Most of these are well-known. I skimmed and didn't see this but another interesting piece is that he had only one testicle.
No doubt Hitler hated Jews but he almost never discussed this hatred in private, it was more to rile up his MAGA, er. Nazi base.
And your subtitle needs work. Hitler is probably the most reviled man in history, as in the past, but the most reviled man in the world today is almost certainly Donald Trump.