Irving has denied that he is a Holocaust 'denier' and even went to court to prove it. He lost. In truth, he's never said the the Holocaust was faked, only that much dodgy information as to methods and the scale of the murder has been disseminated by interested parties. He also said that Hitler was unaware of what was going on until as late as 1943. He's written many books in a 40-year career, more often than not dealing with the Nazi period in Germany and WWII, and was once a respected historian. He wasn't always so controversial, only becoming 'converted' to revivionist views in the late 80s.