I think that JP is going through a crisis of faith. There is no other explanation for the increasingly desperate and absurd arguments he is making for proving the truth of the Torah.
The first error in his post is the obvious logical non-sequitur:
1. Some historical documents are accurate.
2. The Torah is a historical document.
3. Therefore the Torah is accurate.
This absurdity would dictate that we accept as truth any faith's claims, including the the Native American Abenaki creation story of the earth's land mass being formed from a big turtle.
Furthermore, as some have said, extraordinary claims require extraordinary evidence. The Torah makes quite a few extraordinary claims.
An excellent article on the Da'at Emet site summarizes very nicely the archeological evidence for the dating of the Torah. The author notes:
"To determine the date when the Torah was written, a working research hypothesis must rest on a coordination of what was told with the findings. The likelihood is that the author knew his own period, but not the distant past nor the future. Thus, for example, when one wants to determine the date of the book of Daniel, one follows the story to see up until which point it matches historical fact and when it stops. At the transition is when the time of authorship is set. "
Based on the biblical inaccuracies, anachronisms, and contradictions, historians place the authorship around the 7th century BCE. Events recorded from that period and beyond more or less correspond to history as we know it.