@realcaseyrollins@social.teci.worl
Is this a geographical thing. Hitler was German and tried to take over Europe, so those of us in Europe are going to be far more aware and affected by what Hitler and the Nazis did in Europe and the wider world.
Mao was more recent, and was in China, Stalin was in Russia, and yes the USSR did extend far more east than it does now, so maybe it is how people see things from a historical context, ask people in say Poland or even Ukraine what they make of stalin and you may get different responses.
So your feelings towards these 3 people could be down to education, upbringing, family, where you lived or where your ancestors lived.