I gotta pipe in here as Andrew and Guest (and Frank) all said they don't really know what Black Metal is. It is a genre of metal that is mostly defined by the musical style (shrieking vocals, blast beats, progressive song structures, often with synth) as well as its lyrical themes (evil, demonic, mythical, etc.) but is definitely not defined by the few neo-nazi bands in the black metal scene. To say that black metal is racist is exactly the same as saying punk rock is racist. The large majority of it is not racist (although it is generally played by people with near to albino complexion). Now black metal is definitely not friendly music and I would say is extremely anti-christian so there are definitely some prejiduces related to the music, but racism is not one of them.