So I am asking about East European people, especially Poland, who has a reputation to be very catholic.
Religion is a personal matter. Most young people attend religious services ceremonies because they are compelled to by their parents and other adult figures in their communities. With that said I don't see that younger people in Asian, Middle Eastern or any country for that matter are necessarily "really believing".
These so-called religious societies have always had laws on the books regarding crime. I can't think of one that doesn't have a prison system. And in some of the most "really believing" societies the death penalty is still in place and often carried out for crimes which do not involve murder. In some instances the death penalty is carried out by a mob or in front of a baying crowd; yes, even today in the 21st century.
Faith does not equate to social harmony, stability or even shared prosperity.
In Western societies you see a growing prevalence of secularization not atheism. In Eastern cultures you still see the interference of religion in daily life and you can be certain many in those places would much prefer that religion's role was diminished but not eliminated. Religion can play a positive culture role for marking personal rites of passage in life like births, adulthood, weddings, death, etc. But practices which involve coercion (such as conversions, arranged marriages, etc.) or worse the mutilation of body parts must be banned by the state and enforced by the rule of law.