"Please stop calling people "Hitler" when you disagree with them. It demeans you, it demeans your opponent, and, to be honest, it demeans Hitler. That guy worked too many years, too hard, to be that evil, to have any Tom, Dick, and Harry come along and say, "hey, you're bein' Hitler." No, you know who was Hitler? Hitler!"
January 1, 1970
https://en.wikiquote.org/wiki/The_Daily_Show