The argument from metaethics was outdated from the beginning, at least for Christian apologetic purposes. Moral laws of all tribes and civilizations are compatible and are completely opposed to message of Jesus.

Natural law says: love your family. Jesus says: abandon them and follow me. Natural law: love your friends, hate your enemies. Jesus: love everyone. Natural law: defend yourself. Jesus: do not resist. Natural law: defend your property. Jesus: give up everything etc, etc....