The Supreme Court is hearing the case Monday of a Christian graphic artist who objects to designing wedding websites for gay couples, a dispute that’s the latest clash of religion and gay rights to land at the highest court. The designer and her supporters say that ruling against her would force artists — from painters and photographers to writers and musicians — to do work that is against their faith. Her opponents, meanwhile, say that if she wins, a range of businesses will be able to discriminate, refusing to serve (b)lack customers, Jewish or Muslim people, interracial or interfaith couples...