It’s generally not a good idea for an opinion writer to begin a column about a controversial issue with, “I’m not sure how I feel about this one — I think both sides have a good argument.” Opinion writers aren’t supposed to waffle; they’re expected to come down on one side or the other, and with something resembling confidence and certainty. Wishy-washy doesn’t cut it. Except — and here’s your wishy-washy alert — I’m not sure how I feel about a case that went before the Supreme Court this week, a case involving gay rights and religious rights, because I...