During the Nuremberg War Crimes Trials, the defendants kept pleading that they were just “following orders.” Not a single one of them ever said anything to the effect of, “Holocaust? What Holocaust? Slaughtering Jews? What are you talking about? That never happened.”

There you go Bishop Williamson. Putting aside all the historical evidence, documentation, first-hand accounts, photos, films, files, still-standing concentration camps etc., the above alone is all the evidence you should need.