"Skip-hop" - the term "skip" was a derogatory slang term given by Greek and Italian immigrants during the 1960's/70's to white Australians. Short for Skippy. I've never been to a hip-hop gig in my life but it doesn't surprise me in the least that there'd be racist whites getting into it.
I could have sworn I read an article somewhere about European white nationalist hip-hop rappers but as I can't seem to find it it'll have to remain apocryphal. Suffice to say I'd be very surprised if there wasn't any such thing as white power hip-hop by now. When nazi skins started doing rock they copped flack from the older white supremacist crowd for doing "nigger" music. Certainly, there was plenty more ammunition for the skins to use in defence of doing rock music, it'd be harder to do hip-hop, but it would have to be happening by now.