What you're saying is 'Has a historian the right to offend?' and the answer is very definitely, yes. - David Irving

Until the end of this tragic century there will always be incorrigible historians, statesmen, and publicists who are content to believe, or have no economically viable alternative but to believe, that the Nazis used "gas chambers" at Auschwitz to kill human beings. But it is now up to them to explain to me as an intelligent and critical student of modern history why there is no significant trace of any cyanide compound in the building which they have always identified as the former gas chambers.

The defendants will find it very hard to prove it was a Third Reich decision and an Adolf Hitler decision. There were multiple shootings but it was not pursuant to any programme.

The interesting questions are what did Hitler know, did Himmler conceal it, did he keep it from Hitler, where was the killing done, was it Auschwitz, was it the Reinhard camps and that's what people are frightened to research, because they go to prison for it.