I don’t think you can know anything about a person based on their perceived affiliation to a culture. Wars, nuclear or otherwise, aren’t fought by cultures or even countries, but by groups of powerful individuals within those things, and people are all different and have infinitely varying thoughts about things that their governments do, or that other people they share a group affiliation with do. I think it’s best to target any resentment about a specific event at the actual people who took part in making it occur, and not at people who happen identify with the same culture as the hypothetical nuclear perpetrators. The latter doesn’t make any sense to me, unless the goal is to come up with a pre-justification for cruelty or discrimination, which often has a secondary practical purpose beyond just “I’m upset about that nuclear war”.