It’s no secret that Black Metal, at least that which constitutes as both ‘trve’ and ‘kvlt’, has always been a very insular music with a positively colossal stick up its arse, writes Liam Doyle.With a certain percentage of its fan base snatching up cassette tape demos limited to exactly four copies, snarling at and baying for the blood of bands they deem ‘false’, and generally revelling in their own elite status, it’s a wonder the Black Metal sound ever began to expand and socialize as it has these past few years. With the new millennium seemed to come a new Black…