The study is pretty clear that the comeback of religion is closely related to its national identity connotations. What I’m curious about is whether the people in these countries were ever really mostly atheist and have started believing in God again due to these nationalism factors? Or is it possible that while atheism may have been the official state dogma, the people continued to have religious beliefs throughout the communist era, and are just becoming more public about it now?
Couldn’t have been a state dogma, since Atheism is the complete opposite, it is absence of Religion. Like most other situations in history when an overwhelming occupying force is involved, the ideals of those annexed were repressed to keep in line with the tone of the occupier. It’s more about uniformly controlling the populace than anything. People who tend to leave Religion willingly never really go back (this is anecdotal/personal empiricism here, so forgive me) to it, so it is likely they are just being reacquainted with it absence of fear of retribution by the state actor(s) that once inhibited it.
There was quite a bit a variation from country to country. Poland was heavily Catholic all the way through the period. The Communists managed to suppress certain outward signs of religion, but that was about all they could do. Russia was a different story. The authorities tolerated old women who were religious, but everybody else who wanted to have a Bible or anything like that ran a significant risk.
It’s complicated. In the Soviet Union, for example, Stalin eased up on suppressing religion when Hitler invaded. With their backs up against the wall, they allowed for the Russian Orthodox Church to begin to play a more actual role in public life. After the war, religion continued to have some level of tolerance, albeit still very restricted.
Poland also has a centuries long history of pride in its Catholicism, seeing it as a connection to Western Europe, rather than the Eastern Orthodox lands beyond (including Russia).
I met a Georgian around 1980 and he was a fervent Christian, although he had only fragmentary knowledge of it. It was a thing in his family to be fervent, although of course, not publicly practicing, Christians. He knew so little about things that when my wife asked him about Jews in Georgia, he finally said, “I don’t know; I think most Jews aren’t Christian.” Now I am sure he knows much more about it and actively practices religion, Eastern Orthodox, I assume.
Not all former Eastern Bloc states have seen a religious revival; the former East Germany is still the least religious part of Germany and Czechia is one of the least religious countries on the planet.
Not only that; John Paul II was actually allowed to make a state visit to Poland after his election.