If someone hates me because of something I have in common with literally every human on the planet it doesn’t feel nearly as personal as if they hate me because I’m different from them in ways that I can’t control.

Misanthropes generally don’t hate individual people, and can even sometimes enjoy socializing with others. It’s not even all that accurate to say misanthropes hate humanity; they’re actually more profoundly disappointed in it. This is why they don’t engage in mass shootings or other forms of violence, and instead tend to just isolate themselves.