Pride should stem from good personal decisions or accomplishments given one’s situation and life circumstances. Being born somewhere isn’t a decision nor an accomplishment.
Because you did nothing to create any of that. Appreciating one’s country especially certain aspects of it seems like a good idea. Being proud of it makes no sense. Most countries have some ugly shit in their past. Proud of that too? Not sure you get to pick and choose.
There’s nothing that necessitates that you can only be proud of things you have personally done.