I think that it is in this light that the apostle paul wrote Romans 1:18-32, which can be titled: Unbelief and Its Consequences. The enemy of Israel were the other nations who suppressed them and the enemy of mankind is sin.Then the sons of Israel did what was evil in the sight of the LORD; and the LORD gave them into the hands of Midian seven years. (Judges 6:1)
The book of Judges begins with the death of Joshua and the elders. All of that generation followed the Lord but the generation that came after them did not.
A man cannot will his faith on his children. My children are head strong and hard hearted much like the sons of Israel. They do not know the Lord; therefore, they are serving other gods, though they would not call them gods. The truth is, whatever a person thinks about the most and lives for, that is your god whom you serve. God gives those who reject him and serve other gods over to sin, and ultimately, if unrepentant, to death and condemnation. There is forgiveness for all who repent and believe in the Lord Jesus.All that generation also were gathered to their fathers; and there arose another generation after them who did not know the LORD, nor yet the work which He had done for Israel...So they forsook the LORD and served Baal and the Ashtaroth. The anger of the LORD burned against Israel, and He gave them into the hands of plunderers who plundered them; and He sold them into the hands of their enemies around them, so that they could no longer stand before their enemies. (Judges 2:10, 13-14)