In the context of this thread, with overt Nazism combined with music, Ice Cube springs to mind. The antisemitic "No Vaseline."
Posting the lyrics would likely get me banned, so:
http://www.seeklyrics.com/lyrics/ICE-CUBE/No-Vaseline.html
The lyrics to that rap are referred to pretty repeatedly. The reason being that one actually has to look high and low to find racist raps, much of which comes from the same few rappers such as Ice Cube and maybe Ice T (who is married to a white woman) over a decade ago. You can find plenty degrading women. You can find plenty glorifying violence (though there is less of that nowadays) and you can currently find much sexual promiscuity. But people tend to label rap as racist based on a handfull of raps over the years and desire to label it racist based on extreme bias against it. There is much more racist heavy metal music being that it is the choice music of neo-nazis, but you will never hear it on the radio nor see it in the stores. The liberal media strives on promoting ill behavior by blacks for the purpose of normalizing and continuing it. Hence it goes on regularly without a thought. Poor white behavior is attacked, resulting in the more desirable suppression of poor behavior by whites.