"Poor urban blacks have been abandoned by wealthy black Americans who move into the suburbs and mainstream America as fast as they can. "
Welcome to the real world. It has nothing to do with race, it has to do with human nature.
Regardless of race, color or creed, people want their children to be brought up surrounded by people and institutions that share and support their values and want to live in neighborhoods that are free of rampant crime and negative influences.
What's wrong with that?