If a dog can fuck with a wolf and generate hybrids, so can human.

Homo sapiens is the common denominator. Then you have niggers, whites, etc.

Canis lupus is the common denominator. Then you have wolfs, pit bulls, rat-sized-not-dogs-called-dogs, poodles, etc.

The evidence tells us, disagreeable though it may feel, that all existing human races had a common ancestor. In fact, if you go back far enough, all species on planet Earth, plants and fungi included, share a common ancestor with us.

The evidence also tells us -- and this should give us a more agreeable feeling -- that the long-term trend is racial divergence, the races becoming more and more different over time. The definition of evil, in my view, is trying to fight or counteract this long-term evolutionary trend.