The Church of Satan, founded by Anton LaVey, espouses an atheistic philosophy of rational self-involvement called Satanism. The whole bit with the robes and chanting and altars is all for ‘intellectual decompression’ or psychodrama to heighten a ritualistic experience; there is no requisite for belief in the…

They both are. The difference is that the Church of Satan champions actual Satanism as codified by Anton Szandor LaVey in The Satanic Bible where as The Satanic Temple are not actually Satanists at all but more of a collection of liberal Humanists and Buddhists. TST stole the Church of Satan’s name and symbolism for…