I think we can safely dismiss Irving. Maybe, if I feel like it, I'll look up your other "examples."
Quote:Irving's reputation as a historian was discredited[5] when, in the course of an unsuccessful libel case he filed against the American historian Deborah Lipstadt and Penguin Books, he was shown to have deliberately misrepresented historical evidence to promote Holocaust denial.[6] The English court found that Irving was an active Holocaust denier, antisemite, and racist,[7] who "for his own ideological reasons persistently and deliberately misrepresented and manipulated historical evidence".[7][8] In addition, the court found that Irving's books had distorted the history of Adolf Hitler's role in the Holocaust to depict Hitler in a favourable light.