And many of these awful acts were stimulated and some also supervised by these totalitarian regimes.
Why, according to you, UPA started murdering Poles in February/March 1943?
I know this wikipedia article. There is no need to quote it. You should just use appropriate/wiser words, otherwise one day we will learn from you that Bereza was a death camp for Ukrainian women and children, Poles forbade Ukrainians to speak in Ukrainian, and burnt Orthodox priests during 'pacification'. Mykhailo Hrushevsky, an early Ukrainian nationalists leader, is hardly objective source. Ukrainian life in the Interwar Poland was in shades of gray, not as black as some want to paint it.
terrorized the Ukrainian population
The OUN terrorized Galicia too.
Piłsudski, who had also favored finding peaceful solutions to the minorities problem,
I wish you remember it.
They did fight. So what is your point?
That you should change your definition of 'enemy'.
and he spoke out against the Pacification campaign in 1930
There was no pacification in 'Volhynia'. You confuse 'pacification' with 're-vindication', which goal was to deprive the Orthodox of those churches that had been Greek Catholic before Orthodoxy was imposed by the tsarist Russian government
Knowing that Piłsudski's policies appealed to centrist Ukrainian parties, the OUN undertook a policy apparently designed to radicalise Ukrainian Public opinion. In July 1930, Ukrainian nationalists began sabotage actions in Galicia.
In September Piłsudski ordered the pacification of Galicia, sending a thousand policemen to search 450 villages for nationalist agitators. They found weapons (1,287 rifles, 566 revolvers, 31 grenades) and explosive materials (99.8 kilograms), but Galician Ukrainians interpreted intrusive searches in political terms. For many pacifications were the defining experience of Polish state power. By provoking the pacifications, the OUN succeeded in crippling Piłsudski's minority policy in Galicia.
the wrong-doings of your newly-arrived neighbors or ask to resurrect the church from ashes?
UPA didn't murder Osadniks - almost all of them were deported to Syberia. They murdered Poles who lived in Volhynia for generations/hundreds of years, innocent civilians who didn't take part in 'wrong-doings' against Ukrainians. You simply apply collective responsibility.
and listen to offenses against Ukrainian UPA
Nathan, you offend Poles very often, even in this thread, so you shouldn't complain. Everyone has right to his/her opinion.
Let's learn on our mistakes now, so they are not done in the future.
What are your mistakes?