15:8-31 This history shows Israel in confusion. Though Judah was not without troubles, yet that kingdom was happy, compared with the state of Israel. The imperfections of true believers are very different from the allowed wickedness of ungodly men. Such is human nature, such are our hearts, if left to themselves, deceitful above all things, and desperately wicked. We have reason to be thankful for restraints, for being kept out of temptation, and should beg of God to renew a right spirit within us.

30. Hoshea the son of Elah made a conspiracy … and slew him—He did not, however, obtain possession of the kingdom till about nine or ten years after the perpetration of this crime [Hales].

in the twentieth year of Jotham—Jotham's reign lasted only sixteen years, but the meaning is that the reign of Hoshea began in the twentieth after the beginning of Jotham's reign. The sacred historian, having not yet introduced the name of Ahaz, reckoned the date by Jotham, whom he had already mentioned (see 2Ch 27:8).