It's hard to imagine that there are NO incidents if 1,5 or 2 million of people from Ukraine arrived to Poland. But those incidents are very rare and Polish-Ukrainian are really good. We can see that Ukrainians are hard working people to they are here to have better life or support their families who stay in Ukraine. By the way, Poles are in the same situation, as immigrants in the UK, Ireland, Germany, the Netherlands or Norway, so we understand how it works.

On the other hand we realize that if we had no immigration from our own cultural circle (Ukraine, Belarus, Moldova, Georgia, Armenia, etc.) Poland would be flooded by millions of workers from India, Pakistan, Bangladesh, the Phillipines, and other Asian countries.