Despite its resurgence in popularity as a result of the activities of The Satanic Temple (TST), Satanism is still a very widely misunderstood concept. It’s a subculture that values diversity of opinion and individualism. So (as has been occurring with increased frequency as of late) many Satanic groups are reluctant to exclude people who claim to believe in the existence of a literal, supernatural, entity they call Satan.
This trend, I think, is a mistake to allow to persist. It is as much a mistake for practical reasons as it is a betrayal of intellectual honesty. That isn’t the fault of any organization or their adherents, though some are clearly more culpable than others.