Our divisions are markedly political, and they echo religious controversies of the past. “You have heard that it was said to the people long ago, ‘You shall not murder, and anyone who murders will be subject to judgment,’” Jesus told the crowd in the Sermon on the Mount. “But I tell you that anyone who is angry with a brother or sister will be subject to judgment. … You have heard that it was said, ‘You shall not commit adultery,’” he continued. “But I tell you that anyone who looks at a woman lustfully has already committed adultery with her…