Some shall answer them, or they shall answer one another, Surely it is because they have broken the Divine law, which the Israelites made a covenant, Exodus 19:8, Exodus 24:3,7 Deu 5:27, upon which account their sinning was an apostacy, and a forsaking their covenant. Their sinning was not of an ordinary nature, but by idolatry, worshipping images and idols, which indeed were no gods but only in the opinion of those nations that worshipped them.
Related Commentaries of Jeremiah 22:9
Jeremiah 22:9
9 Then they shall answer, Because they have forsaken the covenant of the LORD their God, and worshipped other gods, and served them.