Jehu continues to carry out God’s judgement against Ahab’s family and the worshipers of Baal. As a result, God promises that Jehu will be the beginning of a new line of kings. However, he is not fully devoted to following God.
How sad to be part of God’s judgement, but not devoted to Him. Sometimes Christians are like this too. They can see the sin in other people, but continue to engage in their own. Recognizing sin in others is fine, but recognizing it in yourself and removing it is much more important.