I guess you are referring to ethnic self-hatred. I was confused at first because I couldn't figure how a person hating himself has anything to do with black people. I have seen this happen in some cultures. I know know if it is exactly the same thing, but I find that some people always want to be together and others don't. For example, it seems like Mexicans in other countries always group together. They seem to be supportive of one another. I have noticed the same thing about Kazakh people too. It seems like wherever they are they are always together. On the other hand, I have seen some Russians that don't seem to want anything to do with other Russian when they are living abroad. They even seem to have some resentment for other Russians who are having some success.