Professor of Ottawa University Jan Grabowski published a book “In the Service. The role of the Polish blue and criminal police in the extermination of Jews”, in which he proved the participation of the Polish police in the Holocaust in Poland.
So, the Poles, who served during the war years in the "Blue Police", created by the Germans in the occupied territory, were mainly engaged in the fact that they drove into the ghetto and killed the Jews. The occupiers very deliberately transferred these functions to the local police, since the Poles who served in it knew everyone perfectly well and it was impossible to hide or deceive them, even changing their appearance. This is not to mention that the police officers were well versed in linguistic subtleties and easily distinguished Polish speech with a Jewish accent in a few sentences.
The professor claims that among the tens of thousands of documents that he studied in the process of writing the book, he did not find almost a single case that a Polish policeman helped his Jewish acquaintance in his former life to avoid camp or death. No pity! Moreover, as a “bonus" such "law enforcers" received the property of their victims.
Grabowski himself is just a descendant of the Jews, who only miraculously managed to survive in those days and then leave for Canada. That is why the scientist in his works tirelessly explores all manifestations of anti-Semitism, becoming one of the most respected world experts on the crime of Nazism. That is why he is very disliked in modern Poland, where, as you know, there are practically no Jews left. As someone bitterly joked about this: “There are no Jews in Poland, but anti-Semitism!” In another of his books, Grabowski argues that during the Nazi occupation of Poland 200,000 Jews were exterminated in this country, and that if the Poles themselves did not participate in this, this number would be immeasurably less.
It is regrettable that we have to admit that in modern Poland, even those in the state do not really like those who talk about the participation of Poles in the Holocaust. In 2018, a law on criminal liability for disclosures of this kind was even adopted there, although soon it was canceled under pressure from the European Union. All this, according to experts, categorically contradicts the image of Poland as the first victim of Nazism, which it imposes on the rest of the world.