'Tolerance is the most important civic aspiration. It means a willingness to accept genuine difference, including profound moral disagreement. Achieving it is no easy task. As the philosopher Bernard Williams has observed, tolerance is most needed when people find others' beliefs or practices "deeply unacceptable"vor "blasphemously, disastrously, obscenely wrong." The basic difficulty of tolerance, Williams notes, is that we need it "only for the intolerable."'
John D Inazu, Confident Pluralism, p.87.