He is certainly not that.
He's been set-up as the strawman, a false argument.
See this article at CODOH.
David Irving does not represent Holocaust Revisionism
A crucial misrepresentation in the trailer for the upcoming film "Denial"
By Hadding Scott
Obviously the makers of Denial want the public to believe that falsifications by David Irving underpin the anti-Holocaust argument, but this is far from true. All the essential work was done by people other than David Irving. Again, David Irving is not an expert on the Holocaust. He has never written a book on the subject. Irving's role in Holocaust Revisionism, to the extent that it has been a positive role, has been mostly that he used his pre-existing notoriety to call attention to the findings of others. Consequently, any criticism of the methods or trustworthiness of David Irving as an historian should have little bearing on the credibility of Holocaust Revisionism.
Video – Michael Hoffman on the new movie "Denial" and David Irving
Revisionists are just the messengers, the absurd impossibility of the laughable 'holocaust' storyline is the message.