WWI was the first act of a massive two act drama of civilizational suicide by a formerly Christian culture. WWII was the second act. Post-Christian Europe is a culture that has never really gotten over what it did to itself. I sometimes wonder if we, who are rapidly de-Christianizing, will be the center of some future act of civilizational suicide and the center of the gravity for Christianity will move decisively to China or the global south. One thing I know: when a nation rejects the God of life it chooses the prince of death.
But I also know that God is merciful and repentance is always an option.