As for the rest of the acts of Zimri and the treason he committed, are they not written in the Book of the Chronicles of the Kings of Israel?
Solomon observes (Pro 28:2) that for the transgression of a land many were the princes thereof (so it was here in Israel), but by a man of understanding the state thereof shall be prolonged - so it was with Judah at the same time under Asa. When men forsake God they are out of the way of rest and establishment.
Commenting on 1 Kings 16:15-28
But Omri wrought evil in the eyes of the Lord,.... Openly and publicly, as if it were in defiance of him: and did worse than all that were before him; taking no warning by the judgments inflicted on them, which aggravated his sins; and besides, he not only worshipped the calves, as the rest, and drew Israel by his example into the same, as they...