I certainly don't agree that only black people are homophobic. Yeah rappers are the one getting targeted cause the their lyrics, but they're the ones dissing everybody and everything. They just don't make gays an exception. And I don't actualy see how the rap community represents the black race as a whole. It's not like they're ALL rappers.
It's a generalization really. It's just like saying all white people are homophobes because the majority of white hockey players are. One section, or a subculture of a society doesn't cover that whole population.
I can't say I condone most rappers lyrics when it comes to stuff about homophobia (I still say Eminem is mocking the homophobes themselves rather then gays), but it's not really something to make generalizations out of.
Just a samlpe of Eminem's lyrics (from the same song as
Mossopp took her example from - Criminal):
You motherfuckin chickens ain't brave enough
to say the stuff I say, so this tape is shut
shit, half the shit I say, I just make it up
To make you mad so kiss my white naked ass
And if it's not a rapper that I make it as
I'ma be a fuckin rapist in a Jason mask