[qwerty456127]

> Both are Orthodox Christian countries, whereas Poland is strongly Roman Catholic.

Most of the Ukrainians and Belorussians I've met were either Catholic or had Catholic grannies (and were atheist/agnostic themselves).

[keiferski]

Those were probably Greek Rite Catholics, which is also popular in the Rusyn ethnicity (a Slavic group in the areas between Poland, Ukraine and Slovakia.) Different history than Polish Catholics.

https://en.m.wikipedia.org/wiki/Religion_in_Ukraine#Demograp...

https://en.m.wikipedia.org/wiki/Rusyns

https://en.m.wikipedia.org/wiki/Eastern_Catholic_Churches