The alien agenda is the one thing they need to disprove all religions and create a new one, since the aliens would be far more advanced. If you gather your information only from "mysteries", you should check what actual occultists call the "spirits" and you'll understand that there are no aliens ever in history, nor any will come in the future. Project BlueBeam.
https://answersingenesis.org/astronomy/apophis-bible-prophesy-2029/ - "When discovered in 2004, the preliminary orbit for Apophis indicated that it might crash onto earth on April 13, 2029 (yes, that is a Friday)."
The alien agenda is the one thing they need to disprove all religions and create a new one, since the aliens would be far more advanced. If you gather your information only from "mysteries", you should check what actual occultists call the "spirits" and you'll understand that there are no aliens ever in history, nor any will come in the future. Project BlueBeam.