Is there any interest in discovering the facts about the killing of Trayvon Martin by George Zimmerman? Facts, after all, can undermine ideology. They have the power to dispel fantasy. They can put the brakes on error. They lead, sometimes, to logical conclusions. All of which means, in this particular case, that when the facts come out, they might well undermine “the cause.” We simply don’t know all of the facts yet. We can say with certainty, however, that the cause is not justice, no matter what the protesters, agitators and officials say. The cause is not truth, either. The...