I married into a Polish family. Not only are they the first to fight. They fight all of the time. And grudges? You never met someone who held a grudge like a pole.
My father in law went years without talking to his brother because his brother said something to my wife when she was eight. They talked again the year before we were married—18 years later.
I guess I should be irritated at this comment since it seems rather stereotypical... but I just can’t disagree. I’m half Polish and the Polish side (including myself actually) are notorious at holding grudges. I only saw my grandfather a few times over 25 years, because my mom made a mild comment he didn’t like. My father’s brother... same deal.