Hi! Looking at Special:Diff/2058520852, I see a number of problems with this edit:
Cheers,
It's just outrageous for you to come here and threaten me. You have shown that you clearly have no idea about the nature of the GND statement. I, however, a) took an editing course at the GND in Frankfurt and b) I am the author of the article corresponding to the person on de:WP, so I clearly know the matter better than you. c) I didn't scream, I just marked an important word as important, what cannot be accomplished in other ways at that place. Everyone notices this if they don't want to maliciously interpret it differently. Conclusion: you create incorrect data, I correct it, whereupon you threaten me. You create a threatening, hostile work atmosphere. Maybe we should think about whether you are really suitable to be an administrator here. Because you really did everything wrong here.
You were not threatened; you were warned. Editors here are expected to interact in a respectful and civil manner. By abusing the edit summary to shout at me, you fell short of that ideal. It does not appear that you have taken my warning on board, as your response was neither respectful, nor civil. Please try to do better in future.
Thank you for addressing the content issue. I'm going to step back here and let others resolve that.
I agree with @Bovlb’s assessment of edit summary etiquette. As for the content dispute: GND ID (P227)’s “Land” information doesn’t mean country of citizenship (P27) – it’s basically useless for Wikidata because it has no other meaning than “is tangentially related to a modern notion of state X” (for a more tedious German summary see here).