The topic is perennial: “The Poles did nothing to stop Hitler”; “The Poles murdered the Jews”; “The Poles were the worst of anti-Semites”; etc. So here is one fast response to all of that.
https://www.pbs.org/wgbh/pages/frontline/shtetl/ –> Marian Marzynski’s documentary on PBS “Frontline”.
The Holocaust may be unique in this overlooked way: it was an event so damning of the character of our species that it has been and may remain visited universally over time. The experience of it has given over to the memory of it. Each soul that visits The Holocaust, and there are many ways now, will experience and respond to it differently.
Compiled by the Polish American Librarians Association, a new list of recommended reading emphasizes books that effectively examine inflammatory questions that may never be fully answered or understood but continue to be asked: Did Poles collaborate with the Germans? Why did Poland have the largest Jewish population of any country in Europe? Why did the West disbelieve information about the death camps that was gathered by the Resistance? Why didn’t more Jews resist? Why was Poland the only country in which the death penalty was imposed for Christians harboring Jews? Why was the response of the Catholic Church so meek? Why, by far, are there more Polish names on the roll at Yad Vashem of Righteous Gentiles who saved Jews than any other nationality?http://palalib.org/collection/poland/ (current)
Three million Poles were also taken by the Holocaust.
And there’s no denying the theft and inhabiting of Jewish property by the Poles.
Nonetheless, lose the black-and-white thinking.
For the energetic, two lesser known proper nouns might be worth a look-up in relation to The Holocaust: “Max Erwin von Scheubner-Richter”; “Michael Kellogg” (The Russian Roots of Nazism).
Kellogg’s book: https://academic.oup.com/ahr/article-abstract/111/5/1618/14004
I had left the nouns — Kellogg and Scheubner-Richter — without URLs to encourage readers of the thread to make a little bit of effort to know the true kernel of The Holocaust.
Recommended for viewing: “Image Before My Eyes: A History of Jewish Life in Poland before the Holocaust”.
Addendum in Response to Comment
The Polish experience of the Holocaust had been mixed and not in any small or trivial way. https://en.wikipedia.org/wiki/Nazi_crimes_against_the_Polish_nation tells a part of the story of horror for those in whom the Nazis found no value.