Why does Les support having the Ten Commandments in public schools?
He supports displaying the Ten Commandments in public schools because they are not a religious doctrine. They are the mind of God, holy and perfect, and serve as the criteria for social behavior for both Christian and non-Christian. Everything within them is for mankind's own good, so they can be taught without doctrinal compromise.
Les teaches that although believers are not under the law but under grace, this does not mean the Ten Commandments are cast aside as no good. They remain holy, perfect, and the mind of God, and they are still the criteria for social behavior for both Christian and non-Christian. He points out that the Ten Commandments do not become a criteria of doctrine. That is why he has no compunction about having them in public schools: they are not a religious doctrine but simply the mind of God, and everything within them is for mankind's own good.