If someone points a gun at you, if the threat seems credible, and if you are defenseless against it, and if you would rather be shot than hand over your wallet, then I can only interpret that as false pride, but not as rational behavior and certainly not as ethical behavior. This is all the more true if you are not making this decision for yourself alone.
It is not heroic to die because you did not want to give in out of personal pride, national consciousness, or other false ideals. It is heroic to accept a loss of face in such a difficult situation in order to avert or minimize harm to yourself and others.
If someone points a gun at me, I give the money. If life is a strategy game, then this is the moment where you need to sacrifice a piece in order for the game to even continue. And money is usually a pawn in the big picture of life. I may feel it's unfair or that my ego/honor is hurt, but I'd work though that with my therapist, analyze it philosophically and decide what to do next instead of responding emotionally.
I personally don't value nationalist sentiment. From a humanist perspective, associating yourself with one specific nation and making it your goal to serve the elites who actually control it is unjustifiable. There are things I'd consider good and evil, but they're much more universal and not tied to one's birthplace, taste or mood. Education, progress, science are good to me. So if something damages these, I may call it evil.
Ukraine is not one of these though, it is a conflict where principals are fighting for selfish interests, while working their propaganda machines very hard to convince us that their goals are actually universal and humanistic, to harvest us as a resource. Depending on which bucket you ate your slop from, you get one bias or another. As an average citizen, you should not fool yourself thinking that you're one with something great that you must sacrifice yourself for it, and don't full yourself thinking you're serving some great good.