21 They have roused my jealousy by worshiping things that are not God; they have provoked my anger with their useless idols. Now I will rouse their jealousy through people who are not even a people; I will provoke their anger through the foolish Gentiles.
Matthew Henry's Commentary on Deuteronomy 32:21
Commentary on Deuteronomy 32:19-25
(Read Deuteronomy 32:19-25)
The revolt of Israel was described in the foregoing verses, and here follow the resolves of Divine justice as to them. We deceive ourselves, if we think that God will be mocked by a faithless people. Sin makes us hateful in the sight of the holy God. See what mischief sin does, and reckon those to be fools that mock at it.