Black Metal, Death Metal, etc. has a long history of violence across several countries, some which you could count the number of blacks on one hand. One of the early death metal band members committed suicide with a shotgun and his bandmates took pieces of his skull, fashioned them into necklaces and sold them at concerts. Another guy took exception to a fan's Internet post and mailed him a letter bomb. There was a run of church bombings in Norway, of all places
Discussion on Black Metal crimes here