The trait which unites most branches of Satanism is rejection of a Judeo-Christian deity and the embracing of one’s individualism and strength. Satanism, for the most part, is just a sexier way of being an atheist and any notion of a Devil is merely symbolic. However, theistic Satanic belief is traditional, the type that believes the Dark Lord is a real entity whom many objectively worship and revere, and while this Satan is accepted as an extension of Christian belief, the teaching’s of the big man upstairs are rejected in favor of the Fallen One. That said, theistic Satanism is also complex; while the Devil is revered as a deity, what He actually represents differs from thought pattern to thought pattern, with some such as Mayhem’s Euronymous believing in a horned one whose followers should be enslaved to, while others don’t even necessarily believe that the Devil’s roots are Judeo-Christian at all. So, just because they all believe in and worship a Satan, that doesn’t mean that all theistic folks embrace the same variation of Him. However, for the case of simplicity, all theistic Satanism rejections atheism as they believe in a deity of some kind.
If a poster was created of famous devil-worshippers then Aleister Crowley’s face would no doubt be near the front and center. Despite not actually being a Satanist, Crowley’s “wicked’’ deeds placed him in league with the Dark Lord in the eye’s of the public back in his heyday. However, he was a practitioner of Thelema, a spiritual philosophy of self-empowerment that’s often lumped in with the glorification of evil much like Satanism has been throughout the years. And like old Beelzebub, Crowley and heavy metal fit together like a hand in glove, and his influence in heavy music can be traced all the way back to the genre’s earliest years.