Rap might be thought of as black sub-culture, so what? That only adds to the arguement. "Metal is the white man's thing, but rap is the black man's thing. Let's not be white 'cause CNN tells me it's wrong!" Take a look at just about any prominent REAL metal band's sales and compare them to 50 Cent, Nelly, etc. There's no contest, proving that it's more acceptable to be black than it is to be white.
As for the movies you listed, every single movie you listed came from extremely popular comic books or novels. Of course they're going to do well with such a strong fanbase already.
Pink, Britney Spears, boy bands (in general) all take heavy influences from R&B and Hip Hop (both creations of black culture). So once again, I don't see your point in telling me they're white. Colour of skin hasn't anything to do with this. It's culture we're discussing.
Rock is still popular, but as was before, it's packaged for the average ignorant consumer (see Linkin Park, KoRn, Motley Crue, Blue Oyster Cult, Styx, and other assorted pop bands).
If anything is blown out of proportion, it is the Holocaust and the whole "evil nazi" myth. This should be an interesting read, but before you make comment, read the entire thing.
http://ihr.org/books/harwood/dsmrd01.html.
Edit: If you want to continue this arguement/conversation, whatever you want to call it, PM me.