Of course the Holocaust denier fundamentally believes in a "painless" death penalty. But the framing of the denier alongside the woefully classist historian shows why "fake news" - that is information that corresponds with lived Feeling rather than a lived and verified experience - is so popular.
A film of unflattering contradictions, specifically how we treat those we disagree with, which in turn martyrs them for their own cause. This might make me sound more sympathetic for Leuchter than I am - the man seemed to stumble and fall into life, and is perhaps only qualified in his taking roles that others deemed immoral. One of Morris' gauchest films.