The nations becoming snares and traps is also seen in Exodus 23:33 and Deuteronomy 7:16. The idea seems to be that Israel will be caught in judgment without even realizing it. Idolatry is enticing, offering freedom and satisfaction but ultimately resulting in death.
13 know for certain that the LORD your God will no longer drive out these nations before you, but they shall be a snare and a trap for you, a whip on your sides and thorns in your eyes, until you perish from off this good ground that the LORD your God has given you.