They have provoked My jealousy by that which is not God; they have enraged Me with their worthless idols. So I will make them jealous by those who are not a people; I will make them angry by a nation without understanding.
21. They have moved me to jealousy. He now proceeds further, viz., that God, after having withdrawn Himself for a time, would, at length be the open enemy of the people, so as to repay them in kind. And he points out the mode of this retaliation, that as they had insultingly brought into antagonism with God empty phantoms and vanities, so on His part...
The method of this song follows the method of the predictions in the foregoing chapter, and therefore, after the revolt of Israel from God, described in the foregoing verses, here follow immediately the resolves of divine Justice concerning them; we deceive ourselves if we think that God will be thus mocked by a foolish faithless people, that play fast and loose with him. I.
Commenting on Deuteronomy 32:19-25
For a fire is kindled in mine anger,.... Here begins the account of temporal and corporeal judgments inflicted on the Jews for their disbelief and rejection of the Messiah, their contempt of his Gospel, and ill treatment of his followers; and this here respects the destruction of the land of Judea in general, and the burning of the city and temple of Jerusalem in particular...