It stands to reason that black kids would hear the music of DMX differently than white kids. On the other hand, you're making blanket assumptions about white listeners that may be unfair.

Speaking only for myself, music has often served as an introduction to bigger realities, including that of black people. Did it give me an immediate and authoritative understanding? Of course not, but it has often been a starting point that set me on the course of digging deeper on my own. While I'm sure some white kids reduced DMX to a kind of background noise, how can you be so sure that other white kids weren't moved by his music, and perhaps intrigued by a glimpse into a reality different from their own, and thus made curious to learn more?

Music (like any art) is a subjective experience, and each audience member is bound to develop their own relationship with it, and engage with it with varying degrees of depth.

Ultimately, music can bring people together, as well as make the unfamiliar familiar.