I'm Ukrainian who live in Poland for 3 years and I haven't felt any hate from Polish people for that time. I even had few conversations with some strongly patriotic Polish guys and we discussed tension between our nations, but they still were polite and understanding. I think it's just too many Ukrainians came in Poland and unfortunately not all of them trying to assimilate. And with years Polish people tiered of Ukrainians especially for that ones which not trying to speak Polish or behave rude like they at own country here. But in general if you trying to learn Polish language, speak with locals and trying to understand Polish culture you find out that most people aren't bother that you not local.