A good subject for a movie might be the Polish people’s struggle for freedom from Communism, including the the brutal murder of the priest, Fr. Jerzy Popiewousko (spelling?). Sorry I have trouble with spelling many Polish names.
The Poles were a very determined gruop who resisted Communism for 45 years.
See #48, although in the movie they use a different name for the Priest, but it is definately based on Popieluszko's murder.