“Jehu eliminated Baal worship from Israel, but he did not turn away from the sins that Jeroboam son of Nebat had caused Israel to commit—worshiping the gold calves that were in Bethel and Dan.Nevertheless, the LORD said to Jehu, “Because you have done well in carrying out what is right in My sight and have done to the house of Ahab all that was in My heart, four generations of your sons will sit on the throne of Israel.””
(2 Kings 10:28–30 HCSB)

Jehu annihilated all of the priests of Israel at Samaria and destroyed the temple of Baal and turned it into a latrine that survived to the day the book of Kings was written, but…

The but…was his great failing.  He did not turn away from the sins that Jeroboam son of Nebat had caused Israel to commit.  His dynasty lasted 102 years as the Lord had promised it would, unfortunately, the people did not return to faith in the Lord, but continued down the path of idolatry and apostasy.  They would be sent into exile for this according to the will of the Lord.  They would never return from exile.

Every believer feels the draw of the world, and sometimes the pull is quite strong.  It’s easy to get slowly sucked into the ways of the people around us, all the while continuing to worship the Lord, thus syncretizing our faith into an amalgamation of faithfulness to the Lord along with devotion to the world.  The story of the northern tribes should be enough to demonstrate that the Lord does not accept worship that is split between him and [insert anything here].  In God’s kingdom—which is all of creation—he is all and should be worshiped as all.