Heavy Metal music has been often accused of promoting such naughty ideals. I've briefly touched on why Heavy Metal as ideology and ideology in Heavy Metal are problematic, but this is of a slightly different focus. Let's say Heavy Metal indeed can carry the weight of an ideological system and communicate it succinctly and attractively to the impressionable public, like propaganda. Does Heavy Metal promote Fascism, Nazism or other Totalitarian-regime ideas?
Heavy Metal indeed speaks often of willpower and personal triumph. Misconstruing slightly Friedrich Nietzsche's philosophical output, most of (especially '80s) Heavy Metal seems to promote a 'Noble Savage' ideal, where a man may achieve grace unhindered by the moral dictum of society, somehow inside it (sometimes) but above it (always). Heavy Metal loathes the idea that society must be obeyed, that the Other should be the master. One should burn themselves pure and strong as steel and withstand the outside forces of the world. Anyone introverted enough, and anyone with romance beating in their hearts finds that conception pleasing on some level regardless of its practical impossibility.
Yes, Heavy Metal, in its ignorance, crowns willpower as the prime mover of history. The strong individuals do, the weak are crushed, the world keeps on turning. This is very close to the practical center of many totalitarian social regimes where the privileged classes profit and the underprivileged one suffers. However most Heavy Metal music doesn't go into detail on where will this mysterious willpower come from that will push the strong to be strong and is curiously lacking in the weak that are to be crushed. This is key in understanding the appeal of Fascism and Nazism. The magic organon that explains willpower in those systems is pure blood and biological predestination. You are strong because you are a true German, not an inferior mudblood. And the true Germans must come together and create a society where the weak shall be in the service of the strong, forever. The favoured class of citizen is stroked by this premise because they do not have to do anything to be the chosen ones. They were such just by being born with a specific of genes.
Heavy Metal scoffs at the idea of society and predestination. Heavy Metal sees teliosis as the product of intense hard work. The reader will find very little of this music (especially in the naive '80s) promoting socialism of any sort, Communism or Fascism, wide-set social change and organized movement. For all its talk of internal willpower and becoming strong and defeating weakness, it doesn't get to how that would change and reshape society and how class-based society would take these ubermen, were they to exist. Nor does it explain where this willpower come from, it presupposes that the listener will conjure it somehow out of thin air. This is both the draw of HM music for teenagers, who feel perpetually powerless, and also the explanation on why its listeners are a curious breed of masochists.
The center of Heavy Metal's fascination with power is not relevant to the actual, real-life practical applications of power. Heavy Metal loves the psychological idea of power, the premise of external control being the mirror of internal control. Heavy Metal loves power because the people that write Heavy Metal are not powerful. It is an ode to a god, so to speak. When Heavy Metal goes on about being strong and crushing the weak, it is not describing the reality of the world's strongest men, it's not metal made for Conglomerate super-Companies and world leaders. It is instead negotiating a method for purging internal weakness and achieving total control, for the small fries that are enamored with the idea of self-actualization.
However, as I've gone on about before, total internal control can be actualized only in death; for one to be perfect, they must be ended. The psychological weight of this realization is what pushes Heavy Metal music to conceptualize its inner ambition as outer force: since we do not want to kill our own selves to be in absolute control, we shall slay the Other, pacify the plains and with a commanding gaze, survey all that is around us as static, ended, complete. The death of the outer to appease the fear of inner death, hail satan! In this way, Heavy Metal appears scary to the outsider. However the theater is easily exposed when the outsider realizes that the only action the small fry enamored with Heavy Metal usually takes towards that 'death of the outer', is to print a fanzine, make a small record label or record its own Heavy Metal.
Furthermore the hopelessness of the idea that for one to be complete they must die is what causes revolt, the draw towards chaos, improbability and randomness. Perhaps if we were to turn our gazes away from the headless, perfect statue, given that all is possible in quantum probability, we may turn our gaze on it again and chaos will have altered reality, given it back its head. A way to have everything and still exist, Heavy Metal pulls towards the impossible. That pull is creative however and also feeds back into the creation of more Heavy Metal artifacts. Every record made with this intent is a small chaos probability field, a magical grimoire that may or may not give life in death.
Heavy Metal has endured a brief cultural heyday in the end run of the '80s that brought it to the attention of teenagers of every stripe. Jocks listened to Judas Priest and beat up the nerds in school that Judas Priest's music was intended for. At that curious peak of its popularity, perhaps it had under its wings believers of every sort of ideology who then fervently tried to bend metal to support them (and this explains progressive metal and its modernist/humanist conception as well). However soon after this sort of music was forgotten for other more pliable forms of pop and the demagogues and ideologues fled, those that remained with it (and still remain) are the wimps and nerds and shy introverts (with sometimes big internet mouths) who harbor said desires for control and self-actualization. They are harmless. At worst they shall concoct further dark magic of world destruction that will manifest itself with... yet another black metal cd. Heavy Metal doesn't lead anyone to congregate with like-minded bigots and go on rampages against the weak. The skinheads and other neo-nazis that do that sort of thing and also listen to metal music would do it without metal music as well. Hitler would look at the National Socialist Black Metal bigots screaming in the woods about a 'purer race' and send them panda face-first into the crematoriums.
Heavy Metal is psychotherapy for introverted teenagers, it's not a means for social change. It holds its own dangers and rewards for the individual. Those that are afraid or hostile towards Heavy Metal for ideological issues misunderstand it, either due to not being familiarized with it or willingly doing so, and with some directed malice at that. It is especially curious how proponents of other musical subcultures like indie rock and punk are so scathing in their critique of Heavy Metal as ideology while at the same time are so enamored with its sonic attack, which they have in recent years thoroughly appropriated. There is now a great plethora of post-metal releases in which there is no exaltation towards willpower, no individualism, no romantic poetry of any kind. Instead they are characterized by either oblique and sometimes completely obfuscated lyrics coupled with natural-neutral iconography and aesthetics, or straight-up teenage anger and angst without any higher direction. If Heavy Metal music is socially relatively harmless as I suggest, then these post-metal mixed strands of it are instead safe for it. Heavy Metal music has had its kitty claws removed and those that are the most upset from this are fashioning their scathing retorts to society in the form of jewel cases and cds, with which you cannot seriously wound or maim anyone, as far as I know. The intended audience doesn't care. Instead eager metalhead masochists lap up these odes to world destruction are the proverbial converted choir and the cacophonous feedback-choral that is their aggregate quantity is what we call 'the underground'.