Adam Clarke on Jeremiah 11:10

They are turned back to the iniquities of their forefathers - A great reformation had taken place under the reign of Josiah, and the public worship of idols had been abolished, and most of the high places destroyed; but under the reign of his son and his successors, they had turned back again to idolatry, and were become worse than ever. It required a captivity to cure them of this propensity: and God sent one: after that, there was no idolatry among the Jews.