The second paragraph is very Protestant of you and wrong. Torah teaches that abortion is mandatory if adultery is suspected and the woman is stoned if the abortion bares fruit. It says no shrimp. All moral precepts written from natural law, not revelationl. Indeed, all revelation, prophetic and otherwise, includign those by Christ, come through human filters and words. Words change. Lost histories are found. Practices are reformed. Society impacts human nature. It is not fixed. Only divine nature is fixed and eternal and it is constantly teaching us how to be more human, which will make us more divine. Relativism? Maybe. But relativism is also a belief that the truth is discovered by obedience to the group and its leader rather than through reason and evidence (the only way to find the absolutes).