[RobbyS]

The Bolsheviks killed thousands of priests both Catholic and Orthodox. However Stalin did force many Ukrainians to sever their relations with Rome, More or less the same situation that pertains in China today. What both Catholics and Orthodox should do, of course, is to keep political changes from coming between them. Each should be as independent as possible from the state.

[annalex]

Given the history of the Russian Orthodox Church identifying with the Russian state, the best thing for the Russian Orthodox, let alone everyone else, is religious pluralism in Russia.

[BrooklynGOP]

However Stalin did force many Ukrainians to sever their relations with Rome

Hm... I am pretty sure it were the Czars who were responsible.