My ancestry is Eastern European, but Jewish. My parents were an atheist and an agnostic who hated organized religion but ostracized me because I married outside the religion and celebrated the Christian holidays with my not very religious, but Greek Orthodox husband. (Who is burning in Hell for not baptizing our children according to a priest I met. ) Jews aren't like Christians, they won't welcome you into the fold as an adult without sponsorship and $$. The Christians seem to want a lot of time, money and commitment as well. While they talk a good game, few walk the walk. (I was a widow with three children (14, 8 and 6), I was desperate for some positive guidance and fellowship for my children's sake and got zip.)

I'm a second generation American. My family lives in Slovenia. The first time we visited in 2001 and the country was much more about the church than the second time we visited in 2012. Some family member are still devout Catholics but some are not yet still choose to recognize some traditions more for nostalgic reasons. It seemed that the more educated and the younger people are more likely not to believe like their parents. Sometimes you need to just go along with it, you know what you believe. There is a lot to be said for keeping the peace too, if you are not out to win people over to your point of view.
I'd like to do a DNA test because I believe we are actually Ukrainian originally. Last name 'Renko'

I have met several non religious Eastern Europeans. My ex-wife from Slovakia and a woman I dated from Kiev. Religion was not encouraged during the Soviet rule in those countries and was often practiced in secret. So there was not the intense indoctrination of children we have in the US. But now, the government finds pushing religion a convenient placebo to control the population, just as it does here in the US.

My mom came here when she was 3. Her dad is Ukranian. Her dad spent 10 years in a prison camp in Siberia. He escaped.

My mom was an interpretor for Ukrainians who came here after the wall came down. I went to a few Ukranian services when I was young at the nagging of my parents. I hated it. I didn't know the language and they went on for hours. Pentecostal types. While I am Ukranian I have no connection to the culture. They certainly looked down on us born in America.

My grandfather was Greek Orthodox and he died never having learned English. My uncles were also here from the Ukraine but they lived a few states away. I remember an uncle doing the traiditonal Cossack dancing when they would visit.

I am the only non-religious person in any side of my family (except one cousin who keeps it hidden).

My mom was the only one of her family born here, the 2 siblings and both parents were born Slavic. All devout Lutherans, hated/feared Catholics.

I am Bulgarian and generally I believe Bulgarians are very non-religious, most people visit church only on holidays and rather because it is part of the celebration rather than because of some devoted belief.

OK, read your full post. A lot of religious trappings, like In God We Trust and adding Under One God to the pledge, came about in the 50s during the Red Scare. I think the point of Stalin and all dictators is that they are totalitarian. Religious or not, it is all about absolute power.

Both of my great grand parents on my daddy's side were born in what is now the Czech Republic. I don't think of that end of the family being hyper religious, but they were unquestioningly Catholic. A lot of my generation has wandered off into Protestantism. There might be a few fellow heathens in the group, too.