Would a similar experience by a hindu or b*ddhist or moslem "prove" those religions are true?
I can't speak to the experience/reality of others - only my own.
Exactly. And though this may come as a surprise to you, your personal subjective experience/reality has exactly nothing to do with external objective truth.
Truth is found at Sinai, not in your personal experience.
And that is your own personal subjective truth.
It's based on faith, just as other people's religious beliefs are.
If you have an experience that other documents don't contradict (because there are no other documents relating to the same experience), you have an experience that no other documents confirm (because there are no other documents).
So you're back with faith or self-assertion (like everyone else)
And the endless lectures on paganism: you ought to have an inkling by now that you're quite as pagan as those you condemn (and everybody else), you just believe you aren't.
Let me ask you, how do you determine something to be true?