There is a practical problem in child-rearing, though. The atheist community doesn't offer the sort of support systems that are provided by churches (at least here in the U.S.), so much of what goes on in church communities is almost completely secular. Stuff like skiing trips, sex education, scouting, counselling, emotional and financial support in hard times, etc.

What I see is that most parents are involved in churches, but it is very hard to figure out whether its because of faith or for reasons of practical parenting.