Satanism according to my understanding is it actually an extreme form of atheism that actually goes so far in it' belief there is no god , it actually mocks the Christian faith. It's all based on mockery not actually the occult or devil' and such.
I have seen this mockery in the kingdom hall many times. From the disgusting so called memorial to white washing a history of doctrinal flp flops while running down other churches to the abortion called the new world translation.
Jehovah witness to Satanist isn't really that big a jump.