There aren't just bad people that commit genocide; we are all capable of it. It's our evolutionary history.

Why aren't crazy people content to take over, like, one town? It always has to be the whole word. They can't just control maybe twenty people. The have to control everyone. The can't just be stinking rich. The can't just do genetic experiments on a couple unlucky few. They have to put something in the water. In the air. To get everyone.
I was tired of all of it.

Bad people are intriguing!

Because sometimes in life, sweetheart. The bad guys win

-Ford 'Blame It on the Pain

He seems to be making you that way too - enough to tolerate people like him. And once you start tolerating them, you're going to end up being like them yourself.

There is little evidence that our individual intelligence has improved through recorded history.