Let’s assume, as I do, that the Supreme Court finds a constitutional right to same-sex marriage when it decides Obergefell v. Hodges sometime next month. What happens next? It may be a morning-after landscape of more confusion than clarity, with some rain falling on the victory parades. Conservative Christians, claiming victimization by the onrushing tide of marriage equality, aren’t like to be deterred in their quest for the right to withhold goods and services from same-sex couples. Indiana’s retreat last month, under pressure from some leading corporations, from a law that would have given businesses a religious excuse for discriminating...