My best bet is that the misanthrope doesn't discriminate, that the average misanthrope has lost hope, or faith, or perseverance in regards to humanity, and sees the rest of us humans, themselves included, as not worthwhile instead of just a select few for whatever reason.
It makes more sense because you don't "Hate the Asians" or "Hate the Blacks" because they don't really care what you look like, where you're from, what gender you are. I'd say they're more into equality than us, well for lack of a better word, 'normal' people.
EDIT:
Misanthropes; Am I correct here, or is there something I'm missing? I'd like to know, if you wouldn't mind. This is an opportunity to see how people of different ideological mindsets think, and...yeah. Curiosity is my fatal flaw.