Holocaust denial is illegal in several countries because it is deemed to be, at it's core, anti-Semitism i.e. racist.
David Irving is Britain's most prominent (or should I say) infamous 'historical revisionists', most notably his outspoken views on the holocaust.
But just as there is pseudoscience, there is also pseudo-history, and that is what Irving has been peddling for many years. Whereas scientific or historical 'facts' are based upon evidence, pseudoscience and pseudohistory, such as holocaust denial, are clearly not, and usually have a far more cynical agenda is their core - whether it be the furthering of religious dogma (in ID theory) or religious intolerance and racial hatred (Holocaust denial)...
It's a moot point whether or not Irving has a right to free speech, when he uses that very right to talk complete rubbish - ignoring the evidence (the facts) in favour of a pre-determined agenda, which is racially motivated.
Although I had no respect for Irving before, his respect rating went subzero this morning when I heard on the BBC News that he was preparing to plead guilty because, "New evidence had come to his attention that proved that the Holocaust did infact happen".... welcome to reality, Mr. Irving. The fact that his stance on holocaust denial was never actually based on evidence before means that his sudden appreciation of evidential value looks pretty lame.... not least because he was only saying it to reduce his sentence. Either way,
he has been handed three years in jail for his troubles.
Just as the British courts have at last thrown the book at Abu Hamza for preaching his messages of racial hatred, the Austrian courts have made an example of Irving (albeit long overdue in both cases).... So, for Irving and his twisted take on the 20th Century, I guess it is Goodnight Vienna....