Black On Black Metal Core Scooter Wheels Why Are So Many Of The Scandinavian (and More Northern ) Bands So Death\black Metal/grind(core)-ish And Heavy?

Why are so many of the Scandinavian (and more northern ) bands so death\black metal/grind(core)-ish and heavy? - black on black metal core scooter wheels

Why is it that most groups that are hard .. and most of the night time is less (ie, he could be placed on a "black music") =
Wonder ....