Atheism is irrational.

[Tonus]

The very people I know who have had profound encounters with the Divine usually do not report the outward appearance of the entity they encounter; but rather, focus almost entirely on the affect said entity produced in them - intense feelings of transcendent unity and being immersed in love, etc.

So, cultural appropriation it is.  Unsurprising.

It strikes me as a bit of one and a bit of the other. If I had to guess, I'd say the experiences that I've heard or read about are much like what Chad said-- the person who had this sudden revelation from the divine often doesn't specify which god or spirit spoke to them; sometimes the description only implies the hand of a higher power.

But the God that most of those people wind up serving is almost always a convenient and/or local one or linked to something that was part of the experience (such as having it when in a Hindu temple). For others, it's the start of a longer search (like Cat Stevens, who eventually determined that it was Allah who saved him from drowning in Malibu).

I think the scattered nature of these experiences speaks against the idea that it's the One True God doing it. It could imply that all of those gods exist and that their holy texts are just part of the game they're playing. Or maybe only one of them is real and he's having a tough time keeping all of those pesky demons from roleplaying as Jesus or Gabriel or Moroni or from spiking the incense bowl.