Oswald Kaduk (August 26, 1906 – May 31, 1997) was a German SS-Unterscharführer and Rapportführer at Auschwitz concentration camp.

The son of a blacksmith, Kaduk was born in Königshütte, Upper Silesia. After attending the Volksschule he trained as a butcher before becoming one in 1924. As well as working at the local slaughterhouse, Kaduk also held positions with fire fighting services at the municipal fire brigade in Chorzów and at a chemical plant.

In 1939 he joined the Allgemeine SS and in 1940 he was drafted into the Waffen-SS. He was sent to the Eastern Front, but due to various illnesses and stays at military hospitals he was posted to Auschwitz in 1941. At first he was assigned to watch tower duties in 1942, then became Blockführer and finally Rapportführer. One prisoner reported that he had a weakness for schnapps.

Kaduk was considered to be "one of the cruelest, brutalest, most vulgar" of SS men at Auschwitz:

Historian Andrew Roberts in his book "The Storm of War" recounted Kudak's practice of handing Jewish children balloons just before they were murdered with a phenol injection to the heart at a rate of ten children per minute.

David John Cawdell Irving (born 24 March 1938) is an English writer, best known for his denial of the Holocaust, who specialises in the military and political history of World War II, with a focus on Nazi Germany. He is the author of 30 books on the subject, including The Destruction of Dresden (1963), Hitler's War (1977), Uprising! (1981), Churchill's War (1987), and Goebbels: Mastermind of the Third Reich (1996).

His work on Nazi Germany became controversial because of his sympathy for the Third Reich, antisemitism and racism. He has associated with far right and neo-Nazi causes, famously during his student days seconding British Union of Fascists founder Oswald Mosley in a University College London debate on immigration. He has been described as "the most skillful preacher of Holocaust denial in the world today".

Irving's reputation as an historian was widely discredited after he brought an unsuccessful libel case against the American historian Deborah Lipstadt and Penguin Books. The court found that Irving was an active Holocaust denier, antisemite, and racist, who "associates with right-wing extremists who promote neo-Nazism," and that he had "for his own ideological reasons persistently and deliberately misrepresented and manipulated historical evidence."