Liddle begins the documentary by attempting to survey common criticisms of religion, and particularly antireligious arguments based on the prevalence of religious violence.
In order to support his thesis, Liddle presents numerous examples of actions and words by atheists which he argues are direct parallels of religious attitudes.
He describes Fermilab, a U.S. Department of Energy National Laboratory focused on particle physics, as a "temple to science", and characterises Charles Darwin's On the Origin of Species as a "sacred text" for atheists.
[citation needed] In the final part of the documentary, Liddle argues against a perceived overreliance on "cold logic" and the amoral scientific method.
He focuses primarily on the track record of secular ethics, citing the role of the Jacobins and Cult of Reason in the Reign of Terror in Revolutionary France, as well as the religious persecution under Soviet state atheism.