POLAND DURING SECOND WORLD WAR.
YouTube hides many propolish commentary
(users often can't see commentary except author).

WATCH ALSO:
Poland are no nazi...
https://www.cda.pl/video/19505963f
Response to the Israel... Death Camps is german,
Poles saving jews (polish attitude in WW2)
https://www.cda.pl/video/1950653ed

I Recommend movie Defamation (2009) for insight into the matter.