Are you asking if Hitler wasn't a bloodthirsty murderer or didn't invade other countries would he be considered a great leader?

I have no idea. You're getting into speculation and "what ifs" of historical figures. If he wasn't the hateful murderer and ambitious conquerer of his neighbors he wouldn't be the Hitler we already know from history.

Mao killed more people than Hitler did, yet there are people who think he was a great leader. As a matter of fact, Mao is responsible for more death than any person in human history. I find it very strange that he is not demonized as he should be.