No. Your intuition tells you that. The rest of us understand that, centuries after an event was alleged to have occurred, it’s easy to distort it. Especially if it’s couched in a narrative about how one’s ancestors had broken faith with God and the nation had to be redeemed. The Tanakh is, in fact, full of such events; the Israelites lose faith, carry on with foreign gods, crack their eggs from the fat end rather than the skinny end, whatever, and a prophet is dispatched to set them back onto the path.
“Centuries ago our nation witnessed a great miracle, but lo, our people have broken faith and now you do not know of it! And, look, that’s the reason why [insert bad thing] is happening now!” would seem to be a perfectly acceptable way to get a group of ancient people to believe an origin-myth for their tribe.
After all, that origin myth isn’t really any more ‘solid’, despite your protestations, than any other. Even for the ultimate ur-myth, the creation of mankind, would have had the same sort of evidence, if true: “Yah, my great-great-great-great-great grandaddy used to talk about how he was the grandson of the first man ever created on the planet. True story.”
And yet despite not having specific genealogies for every family in the 12 tribes, tracing how they specifically came out of Eve’s womb, that was pretty well believed too. People believe lots of silly stuff, in ancient times and now. Pointing to mass belief is evidence of nothing, at all other than mass belief.
Oh, and:
Fucking cut that shit out. You are not the Spokesman For The Jews, you do not speak for us. You sure as sunshine do not speak for me. And quite honestly, the way you talk about Jews, you make us sound like ignorant, bible-thumping fundies. Stop it.