Selling Revisionism

[Kingfisher]

This came to mind as suitable for some audiences:

"The Holocaust" ™(insert additional kosher symbols) is Blood Libel Against the German People"

Not sure which audiences you have in mind, as any people that would appeal to are likely to already be converted, and not likely to be found in your school-age audience. Bear in mind that your targets are going to be starting from a position of sympathy for the Jews, primarily because they accept the Holocaust narrative and because they have been subjected to "Holocaust education". It's too up front and sounds like propaganda. They will hear "Blood Libel" and the knee-jerk reaction is "He's an anti-Semite so no point in listening to him". Choose a more neutral intro as a hook to catch attention: something likely to arouse curiosity without alienating.