That is a child's thinking.You're right it is simple, he was a socialist, thus left wing. Socialist is left. Only a liberal would have problems understanding simple fact.The same morons who insist that Hitler was "leftist" also claim that Obama is "socialist". Give one example to support these ridiculous claims.
Have you ever heard the term "RINO"? It stands for "Republican In Name Only". Hitler was a Socialist in name only. In what way was Hitler a Socialist? Everyone is equal..... if you're white, blonde, with blue eyes. Leftists believe in multiculturalism. Did Hitler favor inclusion and amnesty? Tolerance and free love? Voting rights for minorities? No, he didn't support any of that because he was a right-wing fascist dictator, and all of world history agrees.
Seriously, who started this argument? How did this ever become a debate? What is the purpose of trying to say that Hitler was "leftist"? It's just some ridiculous childish way for you to point at liberals and say, "You're like Hitler!" It's just sad.