I do have to disagree with this statement. There's been several studies that show France, the Netherlands, and New Zealand having one of the largest Atheist populations combined in the world and they're getting along just fine without those beliefs. Definitely not like North Korea. You don't have to be a theist to be moral. Morality is not exclusive to religion. I do remember the Nazi's having their own Christian religion and they ravaged Europe and murdered millions of people.
Are those "officially atheist"?