You sincerely have to wonder what would happen? As Whites move out of places and blacks move in, everything they touch has a King Midas effect of turning everything into utter garbage. There's no escaping it. All of the United States would devolve into ethnic conflict never seen on such a massive scale before.
Even blacks are warring against each other in inter-tribal warfare representing hoods not but a street apart in cities all over the US. Of course, the spics would get their cut as they do open warfare with blacks (so much so to the point that blacks complain that every time Mexicans move in, they get their faces kicked in).