David Irving, 67, is not a hero. Indeed, for years this British historian was the bane of extreme right wing, neo-Nazis, who have recently grown rapidly in Europe without a solid, intellectual leader. Irving is convinced that Adolf Hitler was, in fact, trying to protect the Jews from being exterminated. He claims to have a mountain of data which questions the existence of gas chambers at Auschwitz. In essence, he rejects the fact that the holocau