In 1917, during WW1, a propaganda hoax "the corpse factory" was launched, about Germans turning human corpses into fats and soap. (google on it) The corpses "passed through a bath". In 1945, the SHAEF made a propagandafilm with a very famous scene, that portrayed showers as "gas showers" in "death factory" Dachau. The film was made by the famous Alfred Hitchcock under the guidance of Jewish mediatycoon Sydney Bernstein, head of the Psychological Warfare Division of the forces of democracy.