I have seen a whole lot of violent Poles. I think it's one of the most violent countries in Europe. I've even met Poles that hate Poland because of the violence.
I've seen a lot more criminal Western Europeans, than Poles growing up in Suburban NY.
Heck, a few times we tried to stop the dirty Westerners.
I remember one time in Putnam Lake, NY about 10 - 15 Western European Americans, many of them Italian, some of them Irish decided to steal a boat, and throw rocks at Swans, and Geese, they also threw rocks at their eggs.
The only 2 people who objected were my Polish American friend, and myself.
I remember another time in Putnam Lake, NY, about 8 Western European Americans, many of them Italian, some of them Irish decided to steal stuff out of cars, my Hungarian friend, and myself were the only to object, and try to convince them otherwise, of course the idiotic Western Europeans wouldn't listen.
Another friend of mine from Brewster, another Polish American, tried to stop a Putnam Lake, Puerto Rican friend of his from hiring a contract killer over a bad drug deal in Yonkers, so my Polish American called his father, and told him.
Not to say that Poles, or Hungarians are perfect, but Holy shit, most others are vermin in comparison.