What does Isaiah 10:11 mean?

The Lord quotes Sargon as asking one last question, and this question holds solid logic. He and his armies have destroyed the peoples of one city and nation after another. This was regardless of how powerful their gods were supposed to be (Isaiah 10:10). The gods and idols of those peoples could not stop the Assyrians. That included the idols of the people of Samaria in Israel. What would stop Sargon from doing the same to Jerusalem and her idols?

Sargon was right about one thing. Israel's false gods, these "images," had no power to keep him from destroying them and deporting tens of thousands out of the land. The Lord used Assyria to show His people just how utterly worthless their false idols were at protecting them.

He was wrong about Jerusalem. It's true that many in Jerusalem also worshipped false idols. But the Lord would not allow the Assyrians to take Jerusalem, no matter how hard they tried. The Lord was no idol or carved image that could be defeated.