why would a polish person hold a grudge agaisnt the jews
When the Jews came back to Poland after the war, Poles hung them because they didnt want them to reclaim their property. Poles never liked Jews and still dont like Jews. My former boss in Poland said that the Jews bragged that they owned all the businesses and homes, and the Poles owned the streets and sidewalks.
I dont hate or really feel anything about Jews. They had a bad time, but they were not known for being generous. Their reputation was Jews for Jews. That is why when the Nazis came, most Poles, and I said most not all, just handed them over or turned them in. They felt they owed the Jews nothing, because the Jews didn't care about them and would put them out in the street if they couldn't pay the rent. The thing is, the new class of Poles without Jewish heritage will do the same thing, and really, always would do the same thing. There was and is no difference. It was just that the Jews controlled a great deal of the apartments and commerce. If the Poles did, they would have behaved the same way. Jews were an easy target because they were collected and identifiable.
While many Jews did serve in the military and fought to protect the country, during peacetime they were focused only on the ways they could control the economy and become an elite class, and that meant high rents and high prices for goods for which they controlled the supply.
It isn't different now with the rich Poles or with the big money flowing into Poland to buy up properties and make everything too expensive for Poles. (That is why young Poles leave) Now your new foreign resident turn Poles into a service class, while they, the Germans and Dutch, the Brits. control housing, and banking and goods and services and bring ther Euro and the Pound to drive up inflation and make the savings of Poles worth less and less.
Just my opinion based on what I have read and experienced.