1 Kings 16-18

7 And also the word of the LORD came by the prophet Jehu the son of Hanani against Baasha and his house, because of all the evil that he did in the sight of the LORD in provoking Him to anger with the work of his hands, in being like the house of Jeroboam, and because he killed them.

We cannot fight evil with evil. The old playground philosophy of "he did it first" does not defer guilt, it multiplies it.
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