Jerome : (Verse 20) For you have destroyed your land, you have killed your people. According to the Septuagint interpreters who said, 'Because you have destroyed my land and killed my people,' there is no doubt about what they mean. Indeed, Nebuchadnezzar killed and destroyed the land of Judah and its people. According to the Hebrew text, it is difficult to understand how he lost his own land and killed his own people, unless perhaps it should be understood in this sense: you completely destroyed those whom God had given you to correct. Or else: the ancient kingdom of the Assyrians, with you proudly and defiantly raising your neck against God, was completely destroyed. For if you had behaved humbly, and understood your limits, the Assyrians and Babylonians would still be reigning. It was in this manner: you were so cruel to foreigners that you even oppressed subjugated peoples in your frenzy. — Commentary on Isaiah