Holocaust denial is the act of denying the genocide of Jews in the Holocaust during World War II. The key claims of Holocaust denial are: the German Nazi government had no official policy or intention of exterminating Jews, Nazi authorities did not use extermination camps and gas chambers to mass murder Jews, and the actual number of Jews killed was significantly (typically an order of magnitude) lower than the historically accepted figure of 5 to 6 million.
Body Disposal at Auschwitz: The End of Holocaust-Denial
Antisemitism has been going on for years and years, and it did not start or end with the Nazi's. In this article it explains the reasons people blamed Jews for things. The hatred of the Jews does not come from WWII, but it does cause many many deaths in those short years.
DidYouKnowBlog.com... “In 1945, Dwight D. Eisenhower predicted that people would try to dispel the holocaust as a falsehood, and ordered innumerable pictures to be taken of the Nazi crimes to hinder any such attempts.”