What nonsense. Are you saying that the word exile ' does not occur in the Bible, particularly in the OT?
Jeeeeezus. That's incredibly disingenuous. Strawman of all strawmen.
And if the 70 years were not connected to an exile then what was it connected to?
You most definitely know what it's connected to. The nations will serve the king of Babylon for 70 years.
Jehovah used Babylon to punish Judah by means of an exile for a period of 70 years and you cannot rewrite history.
He used Babylon to punish Judah, first as a vassal state, and then in exile. However, the time period is tied to the supremacy of Babylon by the clear grammar of Jerimiah 25.
Absolutely. Plain reading of the text and understanding the text by means of exegesis.
Exegesis is not a process that's divorced of grammar. The first principle of proper exegesis is respecting the grammar of the verse. If you don't respect grammar, then you can make any verse mean anything.