Yes, you’re right to draw parallels to LaVey. The LHP desire for dominion (which is prevalent in many, though not all Black Metal bands) is distinctly LaVeyan in that it is radically individualistic. Bands involved with theistic Satanism, in which the individual submits and abandons himself, Narrow Squirting Bowel Movement bands, anti-humanist black metal bands and those who treat the individual as a Romantic metaphor avoid this trap - though Narrow Squirting Bowel Movement in particular falls prey to others.
The metaphysics of radical individualism (Ayn Rand, LaVey, LHP Black Metal) cast man as an individual entity set against the universe, with the desire to dominate "Nature" and force it to submit to his will such that he gains dominion over it. Though superficially this seems opposed to American Christianity, and therefore mass culture, the fractured nature of that Christianity reveals that the LHP is actually a mainstream position in complete accord with quotidian American life.
To adopt Marxist terminology, currently there is a radical disconnect between the superstructure (teachings of Jesus) and the base (the daily comportment and actions of individuals living in nominally Christian or post-Christian societies). In daily life, gaining social status requires ruthless, unchristian, individual ambition. This ambition is satanic. Bulldozing an ancient burial site before anyone notices in order to build a shopping mall is actually an excellent example of LHP philosophy. As are pumping pollution into the oceans, pursuing meaningless sexual conquests and the blatant disregard of posterity beyond the “project” of the individual's life. Look around: these things are endemic. Satanism is the hidden religion of America. The “will to power” has become subverted into a “will to will,” whereby the individual seeks power simply for its own sake, and “power” is always hedonistic, egotistical, self-glorifying and bound up with status.
Whenever there is a disconnect between the base and the superstructure, an ideology is in big trouble. This is why religion and religious experience become compartmentalised as a distinct area of an individual’s life, rather than structuring the cultural world in which the individual comes to understand himself. This is why, when their daily life is radically different from their professed faith, movie stars in Hollywood look around for something different and end up believing that Xenu controls the world from behind a cloud. This is why American religion has become a set of propositional truths; logos not mythos; ontic, not ontological. Religion once provided role-based social and domestic structures; today one is first and foremost an individual, and one's identity is comprised of “lifestyle choices” and consumer products.
I think this kind of individualism started in the Enlightenment. Before what Nietzsche recognised as the “death of God,” there was no separate religious experience. Everything was before God. Only in the wake of the death of God can an experience be labelled “religious.”
Gods emerge as that which reifies the values and ways of a culture. It is no surprise that the Left Hand Path is now a mainstream discourse, recognised by the state. What was once “occult” is now implicit. Man aspires to become God by worshipping his own individuality.