you are right that they overwhelmingly support holocausts of the left. this is no coincidence. the left puts these fools out there and with an efficient pr machine builds them into something of value, which is totally untrue. this whole intellectual crop of the 20th century is rigged.
I'm forced to conclude that at the core of every "great" thinker lies a totalitarian with the strong desire to rule the world. Why leftists think that socialism and communism are great things after what transpired in the twentieth century is a complete mystery to me.