When I say "nationalistic flamewar" I simply mean people posting pejorative or inflammatory things about specific nations, and/or getting into flamewar-style arguments in the context of national disputes. There's no question that your account did that in this thread, multiple times and quite badly. That's against the HN guidelines, which is the only thing that matters from a moderation point of view.

If it helps at all, I didn't mean to imply that you are espousing nationalism.

Quick question for you to ponder then; did you or did you not engage multiple times with a nationalist who is frequently flagged for starting and persisting in flamewars?

If you did then that would be what is being referenced .. there was no claim that you personally are a nationalist .. it would appear that you're "simply" being pedantic about terms here, which is passively engaging in the behaviour that the guidelines seek to discourage.