First thing I am not hating on them just curious. I have many Polska friends at work and I hardly find anyone of them say thanks to me or any other staffs when offered help. Last week I held door for five Polish people and let them pass first but none of them said thanks. Later that day during lunch I wished good luck to my Polish friend as he was planning to start his own business back at his country but he didn't give back any reply. I found that kinda rude. Another time was when I opened the door for the new Polish lady at work as she had no card to pass through. She had no smiles no thanks no nothing...thats kinda rude. So how come this be?