The guy made Brillant music for a short period of time, he should be remembered and respected for that. Period.
You want to get all right wing, eye for an eye, cut his balls off over something he did his time for be my guest, but that makes you look just as ignorant as he was for killing some gay guy.
He was clearly fucked in the head for a long time, but for a brief period and two albums he channelled that into to top 50 all time Metal albums, maybe not for your average Journey, Def Leppard or Evanescence fan, but for the rest of us that actually like Heavy Metal and how great it was in the early mid nineties it means something. You don't like the guy, you want to piss on his corspe, fine, but don't fuck with the rest of us if we want to show respect for a truely important figure in Heavy Metal and especially the second wave of Black Metal and the scene back then which made it truely special for a short period of time.
Besides he made those albums before he went off the deep end anyways.