At least it pushed those Polacks to assimilate and become regular white Americans. I;) I am half-Polish, and those neighborhoods died even when there were no projects. Without immigration, ethnic neighborhoods never survive thanks to assimilation and upward mobility.
I don’t know if you are intending to be funny or not- but it was not a good thing no matter how you look at it.
My uncle and aunt were one of the last to move out and it was horrifying. They finally pretty much abandoned their place and left to go to a trailer park to get away from where they thought they would be killed if they stayed.