Lavey was a Gentile embodied in a Jewish body in an emergency situation (so it is not the norm, I explain this because I have seen arguments like "my family is jewish, but maybe something like Lavey happened to me," no, Lavey was an exception). But Lavey's Satanism was a really very corrupt version. Which is not only not even remotely comparable to the Temple of Zeus, but not even to JoS's old versions of Satanism. But for what those times were, it was already so much so. That's why in that situation there had to be this Satanist thing in a Jewish body. If it wasn't a visibly Jewish person speaking, they would have murdered him before he even thought of doing something anti-jewish and put the name "Satan" on it.