Forgive me for being blunt, but the thread title alone is fucking stupid.
Krieg, Profanatica/Havohej, Black Funeral, Averse Sefira, VON, Demoncy, Absu, and Judas Iscariot have all made works which surpass much of black metal. In fact, my personal preference holds these bands in higher regard than some Norwegian bands. But personal preferences aside, saying someone should avoid making a particular kind of music is absurd. How does one know the potential of a particular artform without exploring various interpretations of said artform? Are we really going to relegate certain kinds of metal to ONLY this part of the world, and no other? How ridiculous.
If you don't find anything redeeming in US black metal, scourge, that's your prerogative. But just as I cannot stand Candlemass, or Gorguts, I respect the craft and quality of music those acts have produced, even if I personally think all of said bands' music is shit. You're letting your personal judgment stand in as objective analysis. I'm in agreement with Umbrage with respect to industrial as well. Godflesh, Throbbing Gristle, maybe a few more bands; but mostly a worthless genre.