Hitler's father was quite cosmopolitan. He had a nationalist history teacher and a rough time after he was rejected from art school. Take that with a huge grain of salt since this is how he depicts it in his autobiography. I think the major part of his radicalization was in prison while he wrote Mein Kampf but that's just my opinion.

They should probably try to fix the issues that caused the population to vote for him.

It never about "fixing" or "killing" individuals, but about systems that do not work for some people.

These guys just fixed humanity with a hug

I kind of think about things like this a lot because of my family. My mom's parents were amazing. My mom was amazing. Her brother.. total asshole. My dad's parents - especially his mom - were beyond awful. Out of 6 kids, only 2 turned out good, and 1 was my dad. He's told me so many times over the years how he swore he'd never be like his parents. I've wondered before how things might have turned out of my maternal grandparents had been awful and my paternal ones good. I wonder how things would have changed.

The line leading to Homo sapiens went extinct that day after trying to have peace talks with the much more aggressive neanderthal ancestors.