Here you go, since you asked (It's not pretty):
"Bust a Glock; devils get shot. . . . when God give the word me herd like the buffalo through the neighborhood; watch me blast. . . . I'm killing more crackers than Bosnia-Herzegovina, each and everyday. . . . don't bust until you see the whites of his eyes, the whites of his skin. . . . Louis Farrakhan . . . Bloods and CRIPS, and little old me, and we all getting ready for the enemy";
-- "Enemy"; Ice Cube, Lethal Injection, 1993, Priority Records, Thorn EMI; now called The EMI Group, United Kingdom.
You have to admit that a lyric like "killing more crackers than Bosnia-Herzegovina", whie sick and twisted, is a clever line.
So you find one song from twelve years ago, and make the connection that this is somehow a common or popular theme in rap music. And out of curiosity, how much Ice Cube do you actually listen to?