So many things wrong with that but I'll just focus on the two most glaring. For both, I'd like you to keep in mind the adage of "Extraordinary claims require extraordinary evidence."
We're willing to believe indigenous oral traditions from the Americans and Africa that go back hundreds and hundreds of years.
Many oral traditions of native peoples describe locations of now-unknown civilizations. Nothing extraordinary about that. And we can confirm it - sending archaeological teams to focus on a particular site (and sometimes finding it!). Other oral traditions center around hunting areas or agricultural operations, etc. Again, ordinary and quite verifiable in many cases.
Do you have any specific examples of extraordinary claims in oral traditions that we believe without evidence? Please share them if you do.
But if was written down from eyewitnesses, if it was written down 20 or 30 years after the fact, well, who can trust *that*?
When the claims are extraordinary, AND when there is literally no evidence that any "eyewitnesses" of Jesus (let alone the guy himself) actually wrote ANYTHING, then yeah, there is no reason to believe what you as a Christian accept as testimony.
Extraordinary claims require extraordinary evidence.
You do realize that none of the men whose names are on the gospels actually *wrote* them, right?