Your argument is fallacious - Just because Hitler was a mass murdering dictator doesn't mean all his ideas are bad, for example, he thought that one should have pride for their country of origin. I know you celebrated the 4th of July, should you feel bad for affirming a dictator? (And for the record, Communists are only temporary authoritarians, the utopian communist society is enforced socially not by the government, the government functions as a transition to a society that is ultimately communist by default.