What exactly is “holocaust denial”? Why do so many seemingly well-informed people doubt the canonical narrative of the Nazi holocaust? Or perhaps we should ask: Why do so many people who know little or nothing about the historical questions involved express such fervent belief in that canonical narrative? And why has such faith become legally mandated—to the point that in most of Europe one can actually be imprisoned for professing one’s good-faith interpretations of a historical event? In his new essay “American Pravda: Holocaust Denial,” Ron Unz traces the bizarre history of “the Holocaust.” The picture Unz paints…