In 1939, he published pamphlets as "chairman of the American Federation of Peace" that argued that Americans should be sterilized so that their children will no longer have to fight in foreign wars

The guy sounds nuttier than a fruitcake.

Hitler did nothing wrong.

Hitler destroyed Germany, ruined Charlie Chaplin's moustache for everybody and was a middling and amateurish painter at best.

But you have to hand it to him. He did kill Hitler, so there's that.