The diff between Hitler and Stalin is that they were competing for the same nutter votes and supporters. Nazism was called “right wing” (however falsely) because it was the “opposition” to the “left wing” Communists. The reality is they were merely two different prongs on the left wing fork.
Europe, sadly, has never had an authentic real “right-wing” pro-freedom, small-government type mass movement (although we’re seeing the start of it in Eastern Europe, i.e. Hungary). The “old right” in Europe was merely those who supported the monarchies vs. “the left” that was perceived to want to overthrow them for “democracy.” Technically, our Founding Fathers could’ve been called left-wingers for their stances. Of course, the REAL lefties were on full display in the ghastly French Revolution. Mass murder and mayhem.
No escaping the irony. Left to mature; socialism frequently morphs into full communism. I view socialism as communist-light. Also both Germany and Russia killed millions of their own people. Germany used starvation and the ovens. Russia mainly used starvation and coercion. Both countries did that after disarming its population which is why no free people should ever give up their firearms willingly. If the people are going to be targeted to die; better to die with a gun in hand fighting back than kneeling with head bowed.
Stalin killed millions of Communists, as well, Trotsky among them.