Jonsson admits in agreement with that of celebrated WT scholars that the ancient historians are guilty of making contradictory statements.
If historians are so contradictory, then the Society is in like company.
Insight on the Scriptures, volume 1, page 463, subheading Chronology (From 607 B.C.E. to return from exile), after quoting Jeremiah 25:8-11, states:
The Bible prophecy does not allow for the application of the 70-year period to any time other than that between the desolation of Judah, accompanying Jerusalem’s destruction, and the return of the Jewish exiles to their homeland as a result of Cyrus’ decree. It clearly specifies that the 70 years would be years of devastation of the land of Judah.
Isaiah's Prophecy - Light for all Mankind, volume 1, chapter 19, page 253, after quoting Jeremiah 25:8-17, states:
True, the island-city of Tyre is not subject to Babylon for a full 70 years, since the Babylonian Empire falls in 539 B.C.E. Evidently, the 70 years represents the period of Babylonia’s greatest domination