I have some experience with that so I’ll throw in my two cents.

TL;DR for Poland:
It’s the usual case of loud minority (far-right) and silent majority (everyone else). Most people are fine with immigrants, especially if they get to interact with them. Things may change as polarisation increases though (and there’s a pretty significant push for that at the moment, unfortunately).

Long version:
Poland was a pretty multicultural country through a good chunk of its history. It had it ups and downs, plus plenty of conflict and racism (similar to what was present in other European countries at the time) but it wasn’t until WW2 that population homogenised into what you’d think of today.

After the war, immigration has been slowly but steadily increasing - starting with people from USSR and south east Asia (there’s a pretty significant number of people of Vietnamese descent for example). University cities like Warsaw, Cracow or Lublin are full of international students from all over the world. These people often find jobs and stay around integrating without issues and functioning like everyone else. Same with those who immigrate for purely monetary reasons though here integration can often depend on what kind of job they do/work environment they end up in (low pay workers often live and function together to a higher degree than blue collar ones). Even then, there’s usually some interactions between them and the local population (don’t expect any stereotypical ghettos of unwanted “invaders”).

Are things perfect? Obviously not, especially with the rise of far-right rhetoric, but most Poles in my experience either don’t care or are more than happy to interact with foreigners. Heck, many still treat it as something unusual and exotic.

As for Poles being blunt and rude, some of it has to do with how Poles are in general. There’s less “fake” friendliness you’d often see in the Anglosphere and more straightforward “what you see is what you get”. For example, if you ask a Pole “how are you” the usual response won’t be an automatic “fine” or “I’m good” but rather how they actually feel at the moment.
As always, there’s no one size fits all in this kind of thing and temperaments will differ based on person, region etc. but it’s not just people being ass-holes (usually).

Anyway, these are my observations on this. I’m sure there are people with less positive view on this topic but hopefully it’ll clear some things at least.

Norwegian here. Neutral to positive, really. On average, that is. Sure, we have some shitheads that oppose people of the wrong color or creed, but they’re in the vast minority.

My tiny town has been enriched by immigrants. Eons ago, before I moved here from the other end of the country, a lot of Chileans moved here after fleeing Pinochet. Then once Assad truly bungled Syria, we got some Syrians too. And over the past few years there have been a few Ukranian families.

American but maybe I can give a little input… immigration is fine, we want them here as long as they do it legally. They SHOULD get deported if it’s breaking the law. The law and paperwork exist for a reason. I’m not a troll or anything, I hope you do understand. I imagine Poland especially would be the same way.