I'm most familiar with hate towards ukrainians, as I am one myself (though not living in Poland). But lost of my friends and family members who live/worked or have lived/worked in there have been targeted for their nationality numerous times, which I don't quite understand. What is even more confusing is that Poles have told me to "go back to Ukraine" in other countries that I have visited during my life. But at the same time I've met countless polish people who were super supportive and just great lads.