Latin-rite Catholicism is practiced predominantly by non-Ukrainian minorities , in particular Poles and Hungarians . Originally holding a large number of parishes , most of the churches remained empty after World War II , which is attributed to the fact that much of the Polish population ( once a significant minority , especially in the west of modern-day Ukraine ) was killed in the war and the interethnic violence that occurred during the war as well as were subject to forcible evacuations and deportations
interethnic violence
Massacres of Poles in Volhynia and Eastern Galicia
History of Christianity in Ukraine