I agree with Halcon, that religious 'truth' is not hinged upon the tangible. For some of us, that's a deal breaker, for others it elevates the faith. Since I'm not the arbiter of what is a real religion, I can't argue the point. I can, and we have, argued whether the Jesus story as it appears in the relatively late Gospels can be defended with tangible evidence and the answer is, no.
It's a foreign field to die upon, historicity. In the earliest years of Christianity, knowledge (gnosis) and mystery took center place. Now it seems obsessed with shrouds and stone bone boxes.