What does Isaiah 17:9 mean?
This seems to compare the deserted cities of Israel in Isaiah's time with the abandoned heights in the land during the time of Joshua and the Judges. The strong cities of Israel will be desolate following the Assyrian destruction of the land. Those not slaughtered by the Assyrians will eventually be deported out of the land to keep them from revolting against their oppressors. The survivors that remain will be so few that entire cities will become ghost towns. The arrival of the Israelites in the Promised Land, and their defeat of so many Canaanite peoples, caused the Canaanite worship centers on hilltops and high places to be abandoned. Nobody was left to worship the Canaanite gods there.Sadly, Israel was eventually drawn into the worship of those same Canaanite gods. Even though the Lord had given them victory in the land they were still drawn to the desire for more (Judges 2:16–19). Now the Lord's destruction had come on His own people—to shake them loose of their dependence on worthless gods. He would remind and return them to dependence on Him.