scholar:
The historical evidence is that Judah remained desolate for exactly 70 years and began with the Fall with Nerbuchadnezzer ending with the Return under Cyrus nicely confirmed by the historian Josephus in several places.
Nope. Wrong again. Not only are you obviously wrong about the duration of the exile (as distinct from Babylon's 70 years of power from 609 to 539), but parts of Judea remained populated through the exilic period (Ephraim Stern).
Additionally, though Josephus erroneously gives 70 years in one location, he correctly gives 50 in others, and also indicates a 182.5 year period "from the captivity of the ten tribes to the first year of Cyrus" that is not compatible with Watch Tower Society chronology.