Satan worship is actually pretty big where I come from, and used to be the popular trend among young adults and teenagers when I grew up. Churches are still burned occasionally, although not as frequently as during the prime years in the 1990's. Things have settled down now.
I got into that too a little bit. There's power in it, mostly derived from the fact that you deem yourself to be totally isolated from the rest of humanity, which mainly follows Christian religion or Christian morals, regardless of whether they are practising Christians or secular people. The sacrifices, rites and such are a psychological trick to cross a line which you believe that "normal people" wouldn't be able to cross, enhancing your ego, relieving your insecurities and bringing you closer to the core group of people which took part in the same "occultic" rituals. All of your share the same secret, thus you have bonded with each other for life.
Once you accept total amorality, you do gain true, legitimate power over other people, as you can freely lie to them, manipulate them, use them for your own purposes and self-interests, and care nothing for their well-being, as you deem them sub-human. You accept a very different world-view from what the average man has become accustomed to. Nietzsche correctly separates these two outlooks into the world as the "master" and the "slave" morality. The reason why the elite so often use these obscure, occult rituals amongst each other, is to enhance the idea that they are the "masters", while the others, outside of their group, are the "slaves".
You wouldn't be able to make decisions such as going to war, or cutting down on elder people's health care, without, to an extent, having de-humanized the population that you're making decisions for. Each of your decisions might potentially have the implication of claiming thousands of people's lives, which would be too difficult to handle for a person that operates based on the Christian moral world-view.
To an occultist, morals are merely limitations that humans put upon themselves unnecessarily, to prevent themselves from being the men that they could be.
