From your reply, am I to infer that power metal and doom metal are the ultimate expressions of metal? I ask because you say metal developed into these without embracing any ideals beyond those that it started with.
There is an error in what I stated because there is an error in the analogy. You think of "heavy metal as the greatest of all rock genres" - is it rock or is it not? Right there you said it is, but your subsequent arguments make it clear to readers that, on some level, you think otherwise. A thing cannot be what it isn't. Either metal IS a type of rock or it is an outgrowth of it. The former suggests you are your parents, since there is no parent (sorry) rock genre and "rock" itself is an umbrella term; the latter supports your analogy but, in the process, destroys your assertion that metal=rock.
I don't think you'll find any argument here that prog has been heavily embraced by metal - making that particular comparison invalid. However, metal's adoption of punk has definitely been stronger than its adoption of glam and alternative - two styles of rock that, when fused with metal, led to fads whose popularity passed within the span of a decade. The punk influx has remained for over thirty years now, and not only does it remain hugely popular - it has also, instead of fizzing out over time, simply continued to evolve into new forms - speed metal, crossover, thrash metal(all within their "orthodox" definitions), death metal, black metal, metalcore(though I hate to mention it)... How you intend to verifiably equate punk's influence in metal with that of glam or alternative has yet to be shown(although you did somewhat leave behind the argument for alternative).
As a rebuttal to your example of Metallica's initial rejection by their audience, I would like to mention the popularity of bands such as Exodus, as well as the fact that Slayer and D.R.I. toured together in 1984.
Wait? D.R.I. (particularly in the early days) is more rooted in punk than metal, so if Slayer tours with them then that is evidence against your argument, if evidence of anything at all.
You stated that punk was rejected by metal audiences. He provided evidence to the contrary. Since his position is opposed to yours, how does that constitute evidence against HIS argument?
Based on your last post, which you wrote as I was writing the above, the core of the issue has come to light. You want to praise this thing you consider the spirit of metal, which is an outgrowth of the rock movement. Bikes, bitches, and beer. Machine and muscle. Manliness. Pure, unbridled
vir, which transforms perfectly into the sword-and-sorcery element you keep referring. MIGHT! And, as a result, any encroachment on metal's ties to rock is by (your) definition anti-metal, since without a solid basis in rock, there is little element of fun left. And even though a lot of the guys here will harp on about the insignificance of the following things, none of them can deny that bikes, bitches, and beer are FUN. And asserting your manliness is, as a man, a naturally fun thing to do - it makes you feel good. Anyway, the point being that your view leads, by absolute necessity, to seeing any attempt at de-emphasizing the rock elements of metal as treacherous.
However, it's clear that ANUS considers the spirit of metal to be something very different. It's a bit ridiculous to say the site and forum are more punk than metal, considering how domineering, nationalist, and religiously(not merely "spiritually") oriented it is - in short, it's fascist. Yes, the nihilism is there too - but as has been stated countless times, the form of nihlism embraced by ANUS is that of a tool, merely used to clear the way towards the manifestation of envisioned goals. A fire not to destroy, but to clear space for new life. In direct metaphor to this, it sees the punk influence that came into metal as an event that allowed all the trappings of rock music to be eliminated from metal. When seen as a concept existing outside the realm of the influences from which it came, "metal" is by definition anti-rock. As such, any attempt to praise the likes of Judas Priest as being on the same footing as the likes of Emperor (i.e., emphasizing the rock elements of metal) is, by absolute necessity, going to be seen as treacherous.
Tl;dr - there will be, on both sides, no compromises and even fewer converts.