And they forsook the Lord God of their fathers, which brought them out of the land of Egypt, and followed other gods, of the gods of the people that were round about them, and bowed themselves unto them, and provoked the Lord to anger. (Judges 2:12)
Not only the deities of the peoples among whom they dwelt in Canaan, but, perhaps, the deities of the surrounding nations as well. When men forsake God there seems to be no limit to the extent to which they will go in their apostasy.
Forsook the Lord.
Their sin consisted not only of forsaking the God they had covenanted to worship but also of base ingratitude for their deliverance from abject servitude in Egypt from which God had delivered them. From this servitude they could never have become free by their own power. They owed worship to the true God for what He was and for what He had done. His works for His people gave Him a right to their allegiance.