This is actually a lie. Poles that lived in Volhynia fought in groups of Nazi Germany and in the NKVD detachments that fought against the UPA. Therefore, to justify collaboration with the Nazis and communists in this way is very ugly. 

This title should be: «Ethnic cleansing of Ukrainians in Volyn' and Halychyna» because of collaboration of Poles with Nazi Germany and NKVD.