The children of Israel dwelt among the Canaanites

“And the children of Israel dwelt among the Canaanites, Hittites, and Amorites, and Perizzites, and Hivites, and Jebusites: And they took their daughters to be their wives, and gave their daughters to their sons, and served their gods. And the children of Israel did evil in the sight of the LORD, and forgot the LORD their God, and served Baalim and the groves. Therefore the anger of the LORD was hot against Israel, and he sold them into the hand of Cushan-rishathaim king of Mesopotamia: and the children of Israel served Cushan-rishathaim eight years.” - Judges 3v5-8

It was not enough that Israel did not get rid of all their enemies. He we find that they “dwelt among them,” intermarried wit them, and adopted their gods. They did evil in the sight of God and forgot all about God.

There is a danger in compromise. If we do not get rid of the besetting sins in our lives we will soon grow comfortable with them. When we do that we can find ourselves serving sin instead of serving God. We set a poor example for our children and bring them to the point where they may turn from God. The sad thing is that if it goes unchecked we will soon see a generation of our own children who forget all about the Lord.
We must deal with the sins of our lives. Every one of them must be conquered and dealt with, repented of, and forsaken, or else we face a true turning away from God.