more evil Hitler of Stalin?

i would say Stalin. But its like saying who is worse a Black Widow spider or rattle Snake. You begin with the premise that both men brought more misery, pain, and sadness to the World than any two whoever lived.
I would say Stalin because Hitler did have a capacity to love some of the people in his life, such as his mother, or his pet dogs, Hitler did shed a tear or two for others, and mixed up in his perveted ideology was a fear of something terrible that he felt he could divinely prevent. He saw himself as a messiah, sent to save the German people. in the case of Stalin, it would be hard proven to show he ever loved any person on earth, even himself, he possessed the blackest of Hearts and on the spur of the moment could send even what others might consider his best friend out to be shot. Stalin could only have prospered under communism, he could never have been elected through legal means like Hitler, Stalin found his path through power through the bloody purges of communism and the rule of the unelected. He held onto power because of paranoia knowing if he was the one in charge he was the only one safe from the next purge, Stalin is much harder to figure out than Hitler. Even his ambition is hard to understand. The reasons he did the evil things he did, seem to have no reason, he doesn't even seem to be an enthusiastic communist. Communism was his way to power and way to hold on to it because communism gave him the easiest way to control the populace. Hitler is a psychopath and Stalin is a sociopath.
in the natural order of things it is felt that nature created Stalin as the antidote to Hitler. It took one Heartless murderer to defeat another.
Bad times brought both to power.and only shows the future if there is going to be a future begins with embracing the better angels of our natures rather than going with our darker instincts.