First of all, AIDS is not really spreading unchecked any more. There have been advances that have allowed rates to drop.
That said, the impact of AIDS is greater on some African American communities because of the greater incidence of AIDS among them. If this were to continue, the future is hard to predict. There are at least two ways things could go.
On the one hand, the disease could simply devastate inner city communities. This would make them poorer and less stable than they already are. On the other hand, a continued increase might force (as it has in places like South Africa) a greater attention to the problem of HIV and AIDS. It might lead to more tolerance of homosexual behavior that would allow gay men to feel more comfortable about seeking protection from HIV. It might lead to more condom use as people came to realize how serious of a problem it was.
It is never easy to predict how people will respond to a crisis that develops in their community.