Jamieson, Fausset and Brown on 2 Kings 23:26

26. Notwithstanding, the Lord turned not from the fierceness of his wrath,--&c. The national reformation which Josiah carried on was acquiesced in by the people from submission to the royal will; but they entertained a secret and strong hankering after the suppressed idolatries. Though outwardly purified, their hearts were not right towards God, as appears from many passages of the prophetic writings; their thorough reform was hopeless; and God, who saw no sign of genuine repentance, allowed His decree (2Ki 21:12-15) for the subversion of the kingdom to take fatal effect.