Courts can't stop the corrosion of liberalism, but they can stop state-sponsored attacks on individuals. If a long Struggle Session couldn’t break Jack Phillips, owner of Masterpiece Cake Shop, I doubt another frivolous lawsuit will do the trick. Then again, the campaign to destroy Phillips’s business was never merely about punishing a single man for refusing to submit to prevailing leftist orthodoxy. It was also a warning to all would-be apostates that thought crimes could lead to fiscal ruin, public denunciation, and endless harassment. In that sense, the prosecution has probably already paid off. Courts won’t put to rest the...