If a blind protester in a wheelchair is considered a terrorist, anyone can be treated as a terrorist
(www.councilestatemedia.uk)
Yes, plenty of Poles collaborated with the Nazis to make the Holocaust work. For Poland alone, take a look at this article:
https://en.m.wikipedia.org/wiki/1941_pogroms_in_eastern_Poland
It's good that you mention Poland by the way because their government(s) criminalize attributing any responsibility for the Holocaust to Poles:
https://en.m.wikipedia.org/wiki/Amendment_to_the_Act_on_the_Institute_of_National_Remembrance