Jews regularly whine about how they were subjected to “blood libel” – accusations of Jewish ritual murder, which there is plenty of historical evidence for.
Yet the Allies had no problem with accusing Germans of systematically draining children of blood. The blogger Black Rabbit of Inlé has found the following ridiculous piece of atrocity propaganda from The Citizen (Gloucester, U.K.; March 26, 1945):
NAZI “BLOOD FACTORY” The Existence of a German “blood factory” in Latvia in which blood was regularly drawn from small children including babes in arms, was reported in a Soviet News Agency dispatch from Riga to-day.
“Once a week every child was subjected to vivisection,” the report said. “The Germans obtained 40 gallons of blood from them daily, and production was placed on a commercial footing.
“The exhausted sick children were rarely able to withstand more than five or six operations and 10 or 15 of them died daily in each barracks.”—Reuters.