1 Kings 16

1Ki 16:7
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.

"and because he killed them." Remember how God discouraged us against taking matters into our own hands?

Do not take revenge, my friends, but leave room for God's wrath, for it is written: “It is mine to avenge; I will repay,”says the Lord. (Rom 12:19)

It is mine to avenge; I will repay.
In due time their foot will slip;
their day of disaster is near
and their doom rushes upon them.”
(Deu 32:35)

Remember, too, how David did not take matters into his own hand, but spared the life of Saul, trusting in God's plan. Like Saul, the house of Jeroboam was anointed by God to lead Israel, therefore, who had the authority to destroy it except the One who lift it up?

Even though Baasha's deeds fulfilled the word of God, his intentions were not according to God's will, but that of greed and power.

And throughout this chapter, we also see kings rise and kings fall in Israel. And each fall is accompanied by a similar verse as below

because of the sins which he had committed in doing evil in the sight of the LORD, in walking in the way of Jeroboam, and in his sin which he had committed to make Israel sin. (1 Kings 16:19)

Baasha destroyed the house of Jeroboam, only to have his house destroyed by Zimri, who later was pursued by Omri. We see that no nations can stand, away from God (Psalms 127:1).

For this reason, Paul also asked us to, first of all, pray for kings and all who are in authority. (1 Tim 2:1-2)