I don’t need scientific research to know, that majority of people aren’t xenophobic, I even talked about immigrants with far right guys from my former World of Tanks Clan once (you probably know the type: Fixation around national symbols everywhere, flag, Coat of arms, military ect.), and even they weren’t particularly against work related immigration. It’s just the difference between “Borders are Open for All” vs “You’re welcome only if you actually work, don’t crime and respect our culture”.

And well balanced immigration policy actually benefits economy - companies that open logistic centers in poland require cheap work force, and with some effort they can recruit in far less developed east. We have lots of ukrainians, bielarusins, turks and vietnameese doing low skilled jobs.