Jeffro
A standard retort from JW apologists about the Jews returning from Babylon to Judea in 'only' 6 months after Cyrus' decree is that it 'wouldn't allow time for preparations'. This retort never includes any kind of breakdown of just how long it would take to prepare, nor does it account for the fact that the size of the group allowed for division of labour for the preparations. Instead, it is simply a fallacious argument from incredulity.
Exact preparation times can only be speculated, but tasks could be divided among teams for responsibilities such as leadership, logistics, supplies, route planning etc, which would greatly reduce the time required for overall preparations. So the claim that it would be 'impossible' is entirely unfounded, particularly for people who were highly motivated to make the trip. And some of the many Jews who remained in Babylon might also have helped with the preparations.
As far as the journey itself goes, covering just 25km per day (allowing for a comfortable 5km per hour with several rest periods) and allowing 3 rest days per week, the complete journey could be done in about 16 weeks (112 days), if taking the long route of about 1,600km as proposed by the Watch Tower Society rather than the more direct route of about 800km.
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Nice to see that some level of journey preparation was necessary and that some consideration of the travel itself is now considered but you expect others to suspend their credibility and except that all such occurred within a few months in support of the ridiculous and impossible date of 538 BCE. If you are so confident about 538 BCE for the Return then why not present a breakdown of events with precise date beginning from the time of Cyrus' Decree?
Prof. Andrew Steinmann in his From Abraham To Paul A Biblical Chronology proposes that the preparations and journey would have taken five years thus the Jews became resettled and built the altar in 533 BCE. (201, Concordia Publishing House, ST. Louis, pp.190-191).
Further, Steimmann in his article 'A Chronological Note: The Return Of The Exiles Under Sheshbazzar And Zerubbabel (Ezra 1-2) in JETS, Sept, 2008, pp.513-522 states "Since no date is given in Ezra for Zerubbab's mission to Jerusalem, the date is usually given as 537 BC by those who accept Ezra's chronological statement as accurate but this date is usually offered with some reservation".A footnote '3' is affixed and it refers to the EBC commentary Ezra-Nehemiah, 1988 by Edwin Yamauchi "To express his uncertainty Yamauchi gives the date '537?'
Thus, as you frequently refer to our Insight publication then you consider our explanation as to the historical and minor chronological reasons why 537 BCE is the only possible date for the Return.
scholar JW