There is critical proof of the 70 years.
For one, Josephus notes the 70-year exile of the last deportees which is consistent with the Biblical account of when the 70 years occurred; that is, from the time of the last deportation in year 23 of Nebuchadnezzar II to the 1st of Cyrus. This is one of those suppressed references those trying to promote 587 BCE don't like to hear. So here it is:
ANTIQUITIES 11.1.1
1. IN the first year of the reign of Cyrus (1) which was the seventieth from the day that our people were removed out of their own land into Babylon, God commiserated the captivity and calamity of these poor people, according as he had foretold to them by Jeremiah the prophet, before the destruction of the city, that after they had served Nebuchadnezzar and his posterity, and after they had undergone that servitude seventy years, he would restore them again to the land of their fathers, and they should build their temple, and enjoy their ancient prosperity.
This is almost a direct paraphrase of 2 Chronicles 36:
Furthermore, he carried off those remaining from the sword captive to Babylon, and they came to be servants to him and his sons until the royalty of Persia began to reign; 21 to fulfill Jehovah’s word by the mouth of Jeremiah, until the land had paid off its sabbaths. All the days of lying desolated it kept sabbath, to fulfill seventy years.
KEY POINTS here are:
1) Those specifically serving 70 years per Josephus were the "poor people" which corresponds to 2 Chronicles who calls them, specifically, "those remaining from the sword." These are those of the last deportation from among the poor people who were left in the land after the destruction of Jerusalem but who had ran down to Egypt. Upon refusing to return, Jehovah sent Nebuchadnezzar to kill off the majority of them, thus those who were left remaining were called "those remaining from the sword."
This is clear from Jeremiah 44:14 and 28:
14 And there will come to be no escapee or survivor for the remnant of Judah who are entering in to reside there as aliens, in the land of Egypt, even to return to the land of Judah to which they are lifting up their soul[ful desire] to return in order to dwell; for they will not return, except some escaped ones.’”
This is yet another critical reference in the Bible the WTS is loathe to have the R & F connect with. That is, that the last deportation was out of Egypt from the escaped ones. That is because it is all too clear anyone being deported out of Egypt would certainly have to return via Judea and the WTS needs the concept that the land was completely desolated for 70 years began with the destruction of Jerusalem in year 18/19 rather than the year of the last deportation, year 23.
Here is their mind-control, power of suggestion deception regarding who was deported in year 23, even though they know quite otherwise:
Insight Book, page 416:
"Some two months later, after the assassination of Gedaliah, the rest of the Jews left behind in Judah fled to Egypt, taking Jeremiah and Baruch along with them. (2Ki 25:8-12, 25, 26; Jer 43:5-7) Some of the Jews also may have fled to other nations round about. Probably from among these nations were the 745 captives, as household heads, exiled five years later when Nebuchadnezzar, as Jehovah’s symbolic club, dashed to pieces the nations bordering Judah. (Jer 51:20; 52:30) Josephus says that five years after the fall of Jerusalem, Nebuchadnezzar overran Ammon and Moab and then went on down and took vengeance on Egypt.—JewishAntiquities, X, 181, 182 (ix, 7).
Here the WTS has the audacity to use Josephus as a confirmation of the year-23 campaign and yet avoid the specific reference by Josephus that those deported last were those who were down in Egypt. Not some imaginary escapees from other nations! So they avoid a direct reference about Egypt and betray the scriptures at Jeremiah 44:14,28. Here is Josephus' reference from which they quote and thus know for a fact that the historical reference for those last deported were from the official remnant of Jews down in Egypt:
"...the twenty-third of the reign of Nebuchadnezzar, he made an expedition against Celesyria; and when he had possessed himself of it, he made war against the Ammonites and Moabites; and when he had brought all these nations under subjection, he fell upon Egypt, in order to overthrow it; and he slew the king that then reigned (16) and set up another; and he took those Jews that were there captives, and led them away to Babylon. And such was the end of the nation of the Hebrews..."
Notice this is the same reference of Antiquities X! Josephus says nothing about the deportees coming from anywhere else but Egypt. This is in complete harmony with Jeremiah 44 which confirms that those who "escaped from the sword" are the ones who were deported last and who were the specific ones to serve the 70 years.
See what lying, deceptive men the WTS GB is? They need to twist the scriptures to maintain their false 1914 doctrine.
VAT4956 CONFIRMS RELATIVE CHRONOLOGY OF 70 YEARS: Finally, the VAT4956, an astronomical text from the Seleucid Period designed to hide cryptic references from the original timeline that had been changed in a diary full of revised dating, is another means of confirming the 70 years. That's because it dates year 37 of Nebuchadnezzar to 511 BCE in complete harmony with the Bible's dating the 1st of Cyrus to 455 BCE following 70 years of exile. In that case, year 23 of Nebuchadnezzar falls in 525 BCE which means year 37 falls in 511 BCE, confirmed by this text. Thus the "relative chronology" of the 70 years from year 23 is confirmed by the VAT4956 as well.
So the 70 years is not a "thin" reference. We know precisely when the Bible and Josephus apply the 70 years. Of course, we can't get that truth from the WTS who needs to begin the 70 years in year 18 which they incorrectly date to 607 BCE. Their need to confirm the land was totally and continuously desolated from this point down to the 1st of Cyrus requires them to steer the minds of their followers away from the idea that those last deported were from Egypt who had escaped from the sword of Nebuchadnezzar II. Josephus confirms those last deported were from the official remnant of Jews down in Egypt, not some imaginary scattered ones which is not supported by the Bible, and, in fact are contradicted by the Bible.
Can you see, therefore, why the WTS' GB is described as the "man of lawlessness" at 2 Thess 2:4?
But you are also correct that the R & F of JWs are also lovers of darkness. They love and embrace the darkness their glorified leadership provide. They are true worshippers of a new god and mediator, the "Faithful and Discreet Slave" god.
So the bottom line is that the secularists lie about the fall of Jerusalem when dated to 587 BCE, and the WTS also using the false timeline lie about Jerusalem falling in 607 BCE, though they are shying away from that discussion now in their publications. Instead, the true date for year 19 of Nebuchadnezzar, confirmed by the VAT4956 is 529 BCE. This includes a 70-year interval from year 23 of Neb2 down to the 1st of Cyrus. So the 70 years is very firmly established, it is not "thin." But 607 BCE and 587 BCE are the dates that are thin.
LS