While I wouldn't call them humorless, ANUS was dead serious about politics and especially music. For awhile, it was one of the first English-language websites that intellectualized Extreme Metal of all sorts. Twas kindergarten for neophyte Metalheads of all ages. The website's base has continued over here:https://deathmetal.org
In retrospect, much of that site's content is cringeworthy, but I wouldn't have been made aware of Extreme Metal fundamentals were it not for the reviews of such albums over there.
Perhaps the biggest and most controversial thesis at that collective is the idea that Heavy Metal is the natural continuation of Classical music applied to Rock'n'Roll's arrangements. My own feelings on the Metal / Blues / Classical argumentum ad fedora that ANUSites always bring up are somewhat ambivalent. On the one hand, I think the shift away from Rock and Blues that Extreme Metal (especially chromatically-based Thrash, Black and Death Metal) represents is self-evident and inarguable, and at least for my own tastes remains one of those genres' most attractive elements.
However, the idea that there is some clearly obvious Classical or Neoclassical influence in Death mMtal or Black Metal is a load of bullshit. I think this particular pillar of the ANUS catechism---that Extreme Metal is a natural extension of Classical---derives from confused and muddled thinking, along with their well-documented desire (emotional need?) to over-intellectualize the creative processes of young musically-inclined youths.
I think it's also worth pointing out that the typical ANUSite embraces social and political atavism. They have emotionally and intellectually primed themselves to fetishize the past. Perhaps imagining that Metal's recent heritage lies in Mozart and Beethoven stems in part from that habit.
In short: Extreme Metal's move away from Blues and Rock didn't represent a move back towards Classical or a re-imagining of Classical music for the modern world; it represented a wholly novel concept.