They did not destroy the peoples, concerning whom the Lord had commanded them

“They did not destroy the peoples, concerning whom the Lord had commanded them, but they mingled with the Gentiles and learned their works; They served their idols, which became a snare to them. They even sacrificed their sons and their daughters to demons, and shed innocent blood, the blood of their sons and daughters, whom they sacrificed to the idols of Canaan; and the land was polluted with blood. Thus they were defiled by their own works, and played the harlot by their own deeds.” – Psa. 106:34-39

God knows what He’s doing. Listen to Him the first time.