Earlier quoted context omitted.
But if it is 'rap music' violence, madness, drug use, rape, etc. are fine, because if you say otherwise you are racist. Maybe it is racist to not hold all human beings to the same standard of decency?
The key difference is that the Punk subculture sprung up around the music, where much of the 'rap music' was reflective (exaggerated and glamorized) of an existing situation and subculture. I think you can still argue that violent rap music incites or inspires crime though. I think you can generally criticize effects, but you skirt the line with racism when you start projecting that too broadly.
My point is that it is racist to not hold all people to the same moral standard, because in effect we are saying those we do not hold accountable are not capable.