What does Judges 2:14 mean?
The sin of the Israelites went beyond merely bowing down to other gods. That, alone, would have been enough to earn the Lord's anger (Judges 2:11–13). Israel went further, though, imitating the depraved practices of the Canaanites, as God had commanded them to avoid (Deuteronomy 20:16–18). This would have included participating in extreme sexual immorality associated with the worship of Baal and Ashtaroth, as well as human or child sacrifice.With His anger burning, the Lord took steps to actively punish Israel, just as Joshua said He would if they worshiped other gods (Joshua 24:20). The Lord allowed raiders to come against the tribes. These oppressors would take belongings and, likely, people. God allowed the Israelites to fall into the hands of their enemies, such that Israel could not resist those who attacked.
Scripture doesn't yet say who these antagonists are. The early verses of chapter 3 will give a broad summary of the nations who troubled Israel. To a large extent, their identity isn't important. Israel's sin was against God; He used the wicked nations around them to cause harm in punishment for breaking their covenant with Him.