The “here” matters, here. If it’s America or Europe, then yes, Poland is part of NATO and the EU. Its decisions impact its partners. And if it’s invaded, coalition blood will be spilled. Mutual defence means a common interest in being worth fighting for. Add to that Warsaw’s belligerence on multiple political fronts, and the criticism is unsurprising.

More pointedly, this is current news. How are you already judging reactions?

Please don't take HN threads into nationalistic flamewar. Last thing we need here.

https://news.ycombinator.com/newsguidelines.html

Sure, though can you explain how pointing out hypocrisy is nationalistic? Nobody is saying either country is better or worse.

People almost always make such points as part of an agenda against of the sides. If you insist you didn't mean it way, ok, I believe you (though that would be highly unusual)—in that case, though, your comment would have needed to come with enough information to make that clear. Otherwise the default interpretation kicks in anyway.