What Hitler did not believe and what Stalin did not believe and what Mao did not believe and what the SS did not believe and what the Gestapo did not believe and what the NKVD did not believe and what the commissars, functionaries, swaggering executioners, Nazi doctors, Communist Party theoreticians, intellectuals, Brown Shirts, Black Shirts, gauleiters, and a thousand party hacks did not believe was that God was watching what they were doing. And as far as we can tell, very few of those carrying out the horrors of the twentieth century worried overmuch that God was watching what they were doing either. That is, after all, the meaning of a secular society.
― David Berlinski
The Devil’s Delusion:
Atheism and Its Scientific Pretensions
What I find most mystifying in the arguments of the authors I have mentioned, and of others like them, is the strange presupposition that a truly secular society would of its nature be more tolerant and less prone to violence than any society shaped by any form of faith. Given that the modern age of secular governance has been the most savagely and sublimely violent period in human history, by a factor (or body count) of incalculable magnitude, it is hard to identify the grounds for their confidence.
― David Bentley Hart,
Atheist Delusions: The Christian Revolution
And Its Fashionable Enemies