All Ethos's repeated objections have been repeatedly answered, explained, countered or refuted - at length. He still deliberately creates artificial problems and then claims scholars agree with his misconceived notions.
What Ethos persistently refuses to answer (one of many instances) is how his cited sources apply the 70 years 'exile' or 'captivity.' One of his sources says that the Jews' captivity continued after they returned to their land, thereby further debunking his fantasy idea that servitude to the king of Babylon could only happen while in exile. He won't admit that his sources count the 70 years from the beginning of Nebuchadnezzar's reign and end them in 539 or 538 BCE. He has not noticed that his sources seem to view the 70 years as a rounded number rather than an exact one. His sources do not back up his assertions about what servitude HAD to involve. He will not acknowledge that, before Jerusalem was destroyed, the Judean kings and people 'served' Babylon and were under its yoke while still living in their own land - despite the clear scriptural evidence presented to him.
The most laughable aspect to Ethos's appeal to scholarly sources to bolster his flawed concept of the 70 years is that, in their discussions about the 70 years, they uphold the very '609' chronology he emphatically insists doesn't work with the 70 years!