But if you disregard it, then it **becomes** an issue.
How does concluding that Judah went captive to Babylon for 70 years and Zion lay desolate for 70 years, The 70 years ended when the king of Babylon saw the handwriting on the wall goes against grammar? The verse you reference includes the nations but the subject matter of the neviim is the punishment of the 2 kingdoms: vs 8 of same chapter referring to the Southern kingdom.
If you disregard the rest of the Bible you can construe any grammar as you like.