he is the clearest, purest example of evil in living memory. A genocidal dictator leading humanity into world war with the explicit agenda of totalitarian global domination

Stalin and Mao, with 150 million deaths on their hands, (the 2 other socialist regimes, besides Hitlers), would have something to say about that...

You need to understand your history a little more. Hitler was the fall guy for the UN to come into existence. (ww1, league of nations, anyone?)