So agree with the Isaiah commentary with its explanation of the seventy years for Tyre was experienced during the period of Babylon's greatest domination which also saw Judah experiencing her seventy years of servitude, desolation and exile. Both Tyre and Judah expereinced servitude to Babylon within the same historical period of Babylonian supremacy. But those seventy years are not identical with the same exact chronology and both were also different in degree and substance.
You again bring '70 years of exile in', though in your model, many of the Jews were exiled for longer than 70 years and were told that the exile would be for 70 years before the 'exile' had supposedly even started.
Tyre did not have the full duration of 70 years applied to itself. The reason 70 years is mentioned for Tyre is because Tyre, along with many other nations, was included in the list in Jeremiah 25:17-26, and was explicitly identified as being involved in the same 70 years of subjection to Babylon as was Jerusalem, with which the Isaiah publication agrees, much to your chagrin.
You claim that they are two separate periods of 70 years. Therefore you admit that at least one of those periods (the period of nations serving Babylon) abruptly ended in 539, which means you admit that there was a significant event 70 years earlier in 609 regarding Babylon's power in the region.
You assume that 609 was the beginning of Babylonian supremacy with the alleged displacement of Assyria but historians do not agree that 609 is the only date for this 'beginning' for other sholars prefer 605 as a starting point for Babylonian rule. This then alters your chronology for 'seventy years.'
609 is the most broadly accepted year for that event. What is more, it is in agreement with the scriptures. Of course I'm not trying to bolster an end-times prophecy to keep people promoting my literature and giving free labour to my real-estate portfolio, so I have less to lose by being wrong, which I'm not.
The reason why the Society does not chronologize the seventy yeras for Tyre is simply there is no reason to do so as its significance for biblical history and prophecy is minimal. Perhaps you take up your complaint on this matter with Jeremiah. There is no link as you say with the Return of the Jews in connection with Tyre'e seventy years but only with Jeremiah's seventy years ending as we all know in 537 BCE.
I suppose that's why they don't provide a complete chronology of the Neo-Babylonian kings either... sheesh, what a copout!
We all know Babylon fell in 539. We all know Jeremiah said Babylon's king would be called to account after 70 years. We certainly don't "all know" anything about the 70 years ending in 537.
There is no treading lightly with Tyre's seventy years because scholars cannot determine that chronology and you will no reference to this in the literature. Apostates tread lightly with the Jeremiah's seventy years because it overthrows their dumb secular chronology.
When you say "cannot determine", of course you mean it doesn't fit with the Society's interpretations. What a laugh! The chronology for the kings of Tyre, like other chronology of the period, is indeed well established.