Lynn_M.....you risk ridicule if you quote Irving.
Irving is a widely discredited selective historian. He has been accused of holocaust denial. He was sentenced to three months in prison, in Austria for holocaust denial. He is also famous for his racist and antisemitic sentiments, both publicly and privately.
An example of his duplicity and stupidity " In January 1990, he gave a speech in Moers where he asserted that only 30,000 people died at Auschwitz between 1940–45"
If you look at the people he calls his friends these days, the Ultra Far Right, in America as well as Europe, its easy to see why anything he has ever said has to be taken with a wheelbarrow-full of salt.
Here is his Wiki entry.....makes for very interesting reading, something that perhaps you should consider doing.
https://en.wikipedia.org/wiki/David_Irving