Well I'm polish and I've recently met few polish girls that came from poland to work in US this summer. I didnt like them too much.
One girl said Im a pussy because I had no balls to seduce her or make move on her.
I'm was thinking, well I speak english/polish I have a job, go to school, got nice car, wtf do i need polish girl with no english, no job and no car. She should chase me, not the way around

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The European way of thinking is little bit different than the one in US.
For example, in U.S if u buy girl a drink when she asked you, you DLV urself in Poland u would DHV by showing you can take care of them. Basically chivalry is not dead in Poland.
First of all they will probably think they are smarter than you since education level in Europe is higher (i dont belive it but they do).
You should attack their pride or show you are more intelligent.
Personally I would love to be in your place, i would destroy them so fast they wouldnt know wtf to do with them self. But you gave me too little background on them.
When did they come to US?
how well they can speak english?
do they have papers?
do they have a car?
If you dont like them attack everything that is polish lol, say polish jokes to them just google you get millions etc.