Mick Jackson’s Denial (2016) illustrates the complexity of a contentious revisionist historian receiving equal justice under the law. When we think of passion, we think of something akin to ardent conviction. That’s the kind of passion exemplified by Emory University professor Deborah Lipstadt, a historian of the Holocaust whose book, Denying the Holocaust: The Growing Assault on Truth and Memory, made waves when published in 1993. It also brought a lawsuit for libel from David Irving, a once-respected historian turned Holocaust denier singled out in the book. Directed by Mick Jackson and released in 2016, Denial tells the story of...