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He claims that "as a reputable historian with some ground-breaking work behind me I should be enabled to use an element of scepticism in my work without being accused of being a Holocaust denier". Thus, according to Irving, the Jews brought the Holocaust on themselves.  Ernst Zündel trial Ernst Zündel, whom Irving met in 1986 and became good friends with and collaborated with to distribute Holocaust denial
David Irving - Wikiwand
Though leading World War II historians such as John Keegan and Hugh Trevor-Roper praised the book (aside from its claim of Hitler's ignorance of the Holocaust), others began to view Irving as a "creative historian" and to question his methods. In response to his subsequent book, The Trail of the Fox, a biography of German Field Marshal Erwin Rommel, British historian David Pryce-Jones accused Irving of blindly accepting anything Hitler had to say, while applying the strictest standards of suspicion to other sources, notably those with a pro-Allied slant. a b Lay, Kat (26 May 2009). "50 years on: David Irving, Apartheid and ULU". London Student. Archived from the original on 30 November 2009 . Retrieved 21 August 2010. It was around this time that Irving began to run into trouble with European laws against denying or trivializing the Holocaust. In 1989, a warrant was issued for his arrest by Austrian authorities after he gave two speeches in that country denying the existence of gas chambers at Auschwitz. In 1992, Irving was fined several thousand dollars by the German government for denying the Holocaust, and was banned from entering Germany the following year. Today, Irving is also persona non grata in Canada, Australia, New Zealand and, most recently, Austria.
Between 22 and 26 April 1988, Irving testified for Zündel, endorsing Richard Harwood's book Did Six Million Really Die? as "over ninety percent... factually accurate".  But Efraim Zuroff, head of the Simon Wiesenthal Centre in Jerusalem, said the British libel courts were not the best place to determine the truth about anything. Since then, Irving has continued to work as a freelance writer, despite his troubled public image. He was drawn into the controversy surrounding Bishop Richard Williamson, who in a televised interview recorded in Germany in November 2008 denied the Holocaust took place, only to see Williamson convicted for incitement in April 2010 after refusing to pay a fine of €12,000.   Irving subsequently found himself beset by protesters on a book tour of the United States.  He has also given lectures and tours in the UK and Europe; one tour to Poland in September 2010 which led to particular criticism included the Treblinka death camp as an itinerary stop. 
David Irving | Southern Poverty Law Center David Irving | Southern Poverty Law Center
Guttenplan, D. D. (2001). The Holocaust on Trial. New York: W. W. Norton & Company. ISBN 0-393-02044-4. Evans, Richard J. (2001). Lying About Hitler: History, Holocaust, and the David Irving Trial. New York: Basic Books. ISBN 0-465-02152-2.Deborah Lipstadt, professor of modern Jewish and Holocaust studies at Emory university in Atlanta, Georgia, accused Mr Irving of being one of the most prominent and dangerous "Holocaust deniers" in the world in her book Denying the Holocaust: The Growing Assault On Truth and Memory, published by Penguin four years ago.
David Irving, - JSTOR Twentieth Century and David Irving, - JSTOR
By the late 1980s, Irving had placed himself outside the mainstream of the study of history, and had begun to turn from "'soft-core' to 'hard-core' Holocaust denial", possibly influenced by the 1988 trial of Holocaust denier Ernst Zündel.  That trial, and his reading of the pseudoscientific [Note 1] Leuchter report, led him to openly espouse Holocaust denial, specifically denying that Jews were murdered by gassing at the Auschwitz concentration camp.  Hare, Ivan & Weinstein, James (2010). Extreme Speech and Democracy. Oxford: Oxford University Press. p.553. ISBN 978-0199601790.