With CNN’s Candy Crowley shamelessly throwing President Obama a Libya life-preserver at Tuesday night’s debate, the so-called Mohammed video is back in the news. That ought to offend sensible people — and not just because the president, aided and abetted by Ms. Crowley, is lying when he now claims, despite weeks of denials, to have regarded the Benghazi massacre from the first as a pre-planned terrorist attack.