they communicate in Polish, eat Polish food , listen to Polish music and share similar customs
Yet they live in America? Surely their pure-polishness get influenced by out-of polish customs, food, music etc. Or they'd still be back in poland.
in places with big Polish populations like Chicago you don't even have to speak english to live , work or run a business as you handle everything at Polish run banks, Polish lawyers, Polish bakieries, Polish grocery stores, Polish doctors, Polish coffee shops, bars, restaurants and so on.
Or they'd still be back in poland.
People immigrate mainly for financial reasons, not because they find American, Canadian or British culture fascinating.