Are all atheists this ill-informed about religion?

[Esquilax]

That's precisely my point.  So how could God meaningfully reveal himself to a non-believer with everything you just mentioned?  Couldn't whatever you describe just be explained away?

I think the first thing that'd need to happen is that we'd all need to drop this notion that god's revealing himself should happen in a single, never to be repeated event. What we're dealing with here is an unprecedented event, and so if we want to determine the cause then it needs to be, at a minimum, testable, reliable, and available to replicate. There needs to be a longer timeframe than a single meeting; if Floaty Magoo stuck around and I could test the efficacy of his knowledge of me, if I could compare his qualities to those contained in a holy book, test them in some way, even just to see the extent of them, then we'd have something to go on. We might still be wrong in our determinations, but then, the scientific method doesn't demand certainty, just probability, and a willingness to revise come additional information.