Revelation 19:2

This group praises God because of His true (fair) and righteous (just) judgments (cf. Revelation 15:3; Revelation 16:7), especially of the harlot Babylon. It is only right that Babylon, which brought moral ruin on the earth, should lie in ruins.

"By now all men have made their choice between God and Satan. Universal worship of the beast and universal rejoicing over the deaths of the two witnesses mark the world not only as guilty but also as irreclaimable. The earth-dwellers have hardened their hearts forever to a point that precludes any possibility of repentance . . . God’s judgment of those with this disposition is the special occasion of praise to God." [Note: Thomas, Revelation 8-22, pp. 357-58.]

The angels anticipated God’s judgment of the harlot; it had not happened yet. Probably both aspects of Babylonianism are in view here: religious and commercial. The essence of the harlot’s guilt lies in her corrupting the earth with her immoralities (cf. Revelation 14:8; Revelation 17:2; Revelation 18:3). By destroying Babylon God will avenge the blood of believers who died as a result of its influences (cf. Revelation 18:24; Deuteronomy 32:42-43; 2 Kings 9:7).

The outpouring of God’s wrath on the earth-dwellers will come as a consequence of believers’ petitions (cf. Revelation 5:8; Revelation 6:9-11; Revelation 8:3-5; Revelation 9:13; Revelation 10:6; Revelation 14:18; Revelation 16:7; Revelation 19:2). [Note: Idem, "The Imprecatory . . .," pp. 123-31; and idem, Revelation 1-7, pp. 517-24.]