1. The sins they are here charged with are idolatry and persecution. (1.) They oppressed the people of God; they held them fast, and would not let them go. They opened not the house of his prisoners, Isa. xiv. 17. This was God's quarrel with them, as of old with Pharaoh; it cost him dear, and yet they would not take warning. The inhabitants of Babylon must be disquieted (v. 34) because they have disquieted God's people, whose honour and comfort he is jealous for, and therefore will recompense tribulation to those that trouble them, as well as rest to those that are troubled, 2 Thess. i. 6, 7. (2.) They wronged God himself, and robbed him, giving that glory to others which is due to him alone; for (v. 38) it is the land of graven images. All parts of the country abounded with idols, and they were mad upon them, were in love with them and doted on them, cared not what cost and pains they were at in the worship of them, were unwearied in paying their respects to them; and in all this they were wretchedly infatuated and acted like men out of their wits; they were carried on in their idolatry without reason or discretion, like men in a perfect fury. The word here used for idols properly signifies terrors—Enim, the name given to giants that were formidable, because they made the images of their gods to look frightful, to strike a terror upon fools and children. Their idols were scarecrows, yet they doted on them. Babylon was the mother of harlots (Rev. xvii. 5), the source of idolatry. Note, It is the maddest thing in the world to make a god of any creature; and those who are proud against the Lord, the true God, are justly given up to strong delusions, to be mad upon idols that cannot profit. But this madness is wickedness, for which sinners will be certainly and severely reckoned with.