How is that, exactly? Greer isn't a Scientologist. Felos isn't a Scientologist. Michael Schiavo isn't a Scientologist. The Schindlers aren't Scientologists. Terri isn't a Scientologist. Where does that cult come into the picture? Prove it.
Let me try to explain something to you, one does not need to be a member of a cult to use the power of their numbers when the ideology of the cult suits ones own outlook and ambitions. By analogy, Hitler's banker, Schacht, never joined the Nazi Party, but his talents in the field of economics provided the massive funds required for Hitler to arm Germany prior to WW2.
Schacht was wary of the Nazi's. He understood, and openly said he believed the leaders were criminally insane, yet his ambition over-rode all decency and common sense.
For decades after WW2 he used the fact that he was never a member of the Party in his own defence and finally got away with it, although a broken man who struggled with his guilt.
Will Felos and Greer face the same fate? I believe they will. They have taken up the cause of a tyranical death-cult, and not being official members will ultimately not be an excuse for embracing its ideology.