Venting God's anger represents punishing people because of God's anger. Alternate translation: "I have called my mighty soldiers to punish the people of Babylon because they have made me angry" (See: [[rc://en/ta/man/translate/figs-metonymy]])
"they are the ones who proudly exult." Why they proudly exult can be stated clearly. Alternate translation: "even my people, who proudly exult because of the great things I do" (See: [[rc://en/ta/man/translate/figs-explicit]])