David Irving is famous ONLY because he's a holocaust denier. His entire sorry career is built upon it.
All of that being said and despite my wife having relatives that survived the camps (and some who didn't), yes I do think the tragic apology for a man should be free to voice is jaded and ill concieved opinions, as that is what makes us different from the Nazi's, the fact that we should embrace all freedoms, be they to religious or racial freedomk or to the freedom of speech to say things which we find unpalettable.
I do have issues with his ideas being put forward as facts , as they are blatantly untrue, but he should be entitled to say in my opinion this ........ whatever the hell it is he exactly thinks. Then people can see him for the poor taste joke he really is.