Jehu, a commander of the army, hatched a cunning plan to rid Israel of idolatry; well, one form of it, anyway:
2 Kings 10:19 Therefore, summon all the prophets and worshipers of Baal, and call together all his priests. See to it that every one of them comes, for I am going to offer a great sacrifice to Baal. Anyone who fails to come will be put to death. [But Jehu’s cunning plan was to destroy all the worshipers of Baal.]
It was successful:
2 Kings 10:28-29 In this way, Jehu destroyed every trace of Baal worship from Israel. He did not, however, destroy the gold calves at Bethel and Dan, with which Jeroboam son of Nebat had caused Israel to sin.
God was pleased, we’re told, with Jehu’s destruction of Ahab’s family, but removing only one form of idolatry wasn’t enough.
2 Kings 10:31 But Jehu did not obey the Law of the Lord, the God of Israel, with all his heart. He refused to turn from the sins that Jeroboam had led Israel to commit.
This is hardly surprising given the significance of the gold calves in Israel’s history.