Hellhammer and Bathory pre-dated Blasphemy, Mystifier, Sarcofago and others, even if I have a soft spot for Sarcofago and Blasphemy.
I don't know if it's a question of Northern European so much as a Romantic mindset, which most of these bands don't have. Few post-1993 bands are actually black metal, worldwide. The northern Europeans are the biggest offenders at this point. Well, actually, it's hard to tell who is the biggest offender, because there's about 5 good releases since 1993 and so much shit or trivial novelty stuff (including most "exotics," degrading colonial term) that few who can think are still looking. It's like sifting through a city's worth of poop looking for the corn. Forget it.