It is well known that through certain drugs Man can reach a state of Spiritual or Mystical awareness.
Some claim to have met God himself, while others say they have reached higher planes of existence where they have met intelligent beings who want to share information with them. Budgie has had a few experiences of that type himself.
There is also growing evidence that ancient cultures used psychedelics for their mind-altering properties (There have been discoveries of rock-art with pictures of mushrooms sprouting out of human bodies and the like).
Maybe they saw the 'beings' that they met on their journeys as 'god-like' creatures (Budgie thinks they almost certainly did), and started to worship them. And that could be how religion began.
Now, if that were true, it would probably mean that all of the world's major religions are all based on psychedelic drug use. Can't imagine the any Church would be happy about that
The fact that all the religions have different claims about who 'God' is, could be due to location. Different locations in the world have differing natural psychedelics, so all cultures would have a varying view on the subject.
What does swiy think?