The post-Christian nations are primarily in Western Europe, where both Protestantism and Roman Catholicism both essentially surrendered to the tidal wave of materialism in the 20th century. Eastern Europe is different.
The Serbs still practice their Orthodox faith. Maybe that's the real reason why Clinton and the U.N. decided that they needed to be bombed into submission.
Understood about Eastern faith. That's why I was specifying Western Christendom. The Orthodox countries have not rolled over for materialism or Muslims.