"The Holocaust" is a belief of religious nature

THE WHITE HOUSE (September 25, 2012)

President Obama’s Speech at 

the United Nations General Assembly

Excerpt: The future must not belong to those who slander the prophet of Islam. Yet to be credible, those who condemn that slander must also condemn the hate we see when the image of Jesus Christ is desecrated, churches are destroyed, or the Holocaust is denied. 

http://www.whitehouse.gov/the-press-office/2012/09/25/remarks-president-un-general-assembly

September 25, 2012