It’s possible that President Obama knew his remarks at the prayer breakfast would blow some of his opponents' stacks; it’s possible he’s surprised by the controversy. But controversy there is, manufactured or genuine. At the National Prayer Breakfast on Thursday, President Obama made a reference to Christianity that infuriated some conservatives. Speaking in general, Mr. Obama began by condemning zealots who hijack religion “for their own murderous ends.” He cited the recent massacre at a Pakistani school carried out by the Taliban, the assault on Charlie Hebdo headquarters in Paris perpetrated by radical Islamists, and the terrible murders carried out...