I think it is unnatural to dislike people, it requires more energy and has negative health effects, like people-don't-like-you-because-your-a-crappy-person-itis. I don't care what somebody did in their past. It doesn't bother me. It doesn't impress me. Who are you now? How do you treat people right here, right now? How do you treat me?
Even when people are mean, I still don't hate people. I love 'em, can't help myself!
Spread a little you, spread a little love.