actually, in truth, rap isn't strictly "black" music.
Heard of The Beastie Boys? White band
& pretty much what rap was originally. It was simply adopted & changed by black artists until what it became largely what it is now.
& some people simply don't like rap & hip hop, not because a majority of contemporary artists in the genre are black, but because of the way it sounds, & possibly because of a lack of diversity in lyric subject matter.
Personally i like some rap, just not the artists who make a bunch of catchy pointless songs.
such as about how rich they are, how "gangsta" they believe they are, or how much sex and/or drugs they're getting. Or any of that superficial ego-trip bullcrap.
i like lyrics i can identify with, or that evoke a feeling, etc
Not that i don't like some of the ones that are just catchy, funny, or sound cool too though haha.