Albert Barnes Commentary Psalms 106:36

"And served their idols, Which became a snare unto them." — Psalms 106:36 (ASV)

And they served their idols - (Judges 2:12–13, Judges 2:17, Judges 2:19; Judges 3:6–7).

Which were a snare to them - Like the snares or traps by which birds and wild animals are caught. That is, they were taken unawares; they were in danger when they did not perceive it; they fell when they thought themselves safe. The bird and the wild animal approach the snare, unconscious of danger; so the friend of God approaches the temptations which are spread out before him by the enemy of souls—and, before he is aware, he is a captive and has fallen. Nothing could better describe the way in which the people of God are led into sin than the arts by which birds are caught by the fowler, and wild animals by the hunter.