Well first: A satanic cult would be a religion. You could argue that Christianity in some forms is a satanic cult (since people like you favor the hell so much over heaven)
Second: EVERY religion claims that they are the chosen people. That’s the whole deal of religion. We are right and chosen and should rule over everyone else.
Third: If everything was their Scans it would mean that essentially everyone was in on this at least every scientist, banker, politician, news outlet, high ranking soldier etc. So why would they even need to do anything?