What does Leviticus 20:3 mean?

If anyone does this and I look the other way, I will turn against that person and cut them off from their people, because they gave a child to Molech and made my holy place unclean, dishonoring my name. Leviticus 20:3 - Modern Text Bible

(God says he himself will act if the community fails, because this sin pollutes everything he stands for.)