In other words, could the Holocaust have happened without philosophy?

Part of the film's purpose is to lead students to understand how the German people could have let the Holocaust happen.

"I never deny that the Holocaust happened, but we believe the number of 6 million is exaggerated," he continued.

The book gives a detailed explanation of how people came to deny that the Holocaust ever happened.

"You still have people who say the Holocaust did not happen," she said.

Denying history: who says the Holocaust never happened and why do they say it?

"Where would be the most fabulous kingdom you could have taken this phrase book to, if the Holocaust hadn't happened?"

Nor does the museum tell us how the Holocaust could have happened.

But he can't take seriously an historian who doubts whether the Holocaust ever happened.

"Without hate, the Holocaust could never have happened," he said.