We have plenty of evidence that those historical artifacts are not true. The Bible and other holy texts make many claims that can be tested. Also, why selective trust? Why not treat all historical artifacts with evidence of supernatural equally? Are there tests to determine which are more truthful?
I'm honestly curious about this - what claims from the Bible and other holy texts can be tested? Or what claims are you thinking about? And which claims have evidence of being untrue (when such claims were actually claiming history, rather than being allegory?)
I mean claims like "Jesus walked on water" or "Moses saw a burning bush" are not really testable - you can test that someone today can't walk on water, or you cannot construct a burning bush, but you can't say that it didn't happen. I agree you do have to choose to either write it off as fiction or a lie, or say "huh, maybe we don't understand everything about the universe." Which even physicists will tell you
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As for the new testament, most even legal scholars say the number of new testament authors, and the fact the stories are the same but different enough, that they are probably evidence that
something happened that was significant enough for them to write about it. And it wasn't clearly to get notoriety or riches, considering basically all the authors were killed; those people believed in what they wrote. It's more compelling than "one dude sat alone and claimed to have a revelation" stories.
Incidentally I don't think Norse mythology is incompatible with Judeo-Christian mythos either; I happen to think that most of these "other" gods were Nephilim or fallen angels or something, so the idea of Loki fits in just fine.
Of course, it's entirely possible we are indeed in a simulation, and these things are all just NPCs or the avatars of the people running the simulation.