The central plot of the movie is the libel case brought by noted holocaust denier David Irving, against American historian Deborah Lipstadt; which ends up being a great court room drama on defending the idea that the holocaust happened.
But in the modern day news environment it highlights a larger issue - how difficult it is for truth to overcome deliberate falsehood; and how difficult it is for the lay person to identify the nuances between fake and real events. This is not about the easily overturned items that populated the tabloid press - but rather the nuanced ideas from otherwise reputable persons (as in the case of David Irving - who, according to Wikipedia still has notable biographies and historical studies to his name). We see this often with climate science denial, and previously in research into effects of smoking - deliberate misdirection and misinformation is difficult to identify, and ultimately leads to mass confusion.
Overall, Denial is an ok movie; and a great primer to the key issues of the court case. The long slog to prove something that is so well documented and researched as the Holocaust proves that the fight against fake news has a long road ahead.
