2:6 Because of the Babylonians' sins it was inevitable that the righteous would taunt and mock them. They would pronounce woe on them for increasing what was not theirs just to have more and for making themselves rich by charging exorbitant interest on loans. How long would this go on, they asked themselves (cf. 1:2). When would God judge Babylon?
2:7 Those from whom Babylon had stolen would surely rise up and rebel when they woke up to what was going on. Then they would turn the tables and Babylon would become plunder for them. This happened when the Medes and Persians rose up and overthrew Babylon in 539 B.C.
2:8 Babylon would suffer the same punishment it had inflicted on other nations (cf. Prov. 22:8; Gal. 6:7). Its survivors would loot it because it had looted other peoples. Babylon's pillaging had involved human bloodshed and ethical wrong ("violence") done to the land of Canaan and to the city of Jerusalem and its inhabitants.
