As a Christian lawyer — even when I was engaged in the “commercial” practice of law rather than the nonprofit, constitutional work I do now — I always drew moral lines around my representations decisions. I was not going to use whatever meager talents God gave me to advance or celebrate causes or principles I knew to be wrong. In other words, I discriminated. But not on the basis of race, gender, disability, or sexual orientation, but rather on the basis of the action or legal principle the case would advance. I’d happily represent anyone, gay or straight, in a...