People would look at sacred buildings and percieve them just as we do now with Roman and Greek Ruins or the Pyramids or Mayan temples.
Yet We are aware that those buildings were built by, for the most part, theists of some flavour or another. If I don’t remember ever being a theist and nobody else remembers ever being a theist but there are clearly buildings build in the last few decades that express a belief in a god — and perhaps more importantly records of , say, televangelists or prominent politicians expressing theistic views — how would those be explained?
Sorry, just musing on what I consider to be a very interesting idea that I’m sorry I missed. And thinking that that this concept could make for some very interesting science fiction. Don’t worry, davis, I’ll credit your idea as the inspiration when I get published. 🙂