You can be proud of yourself and your own achievements. You can be proud of how your kids or students turned out and, to an extent, their achievements. You can be proud of your teammates (colleagues, coauthors etc) and what your team has done. Being proud of millions of totally unrelated people, or a social construct like a "nation" or a "country" is a big fucking stretch. If you insist on doing that, you also need to be ashamed of all the awful shit your country has done too. And believe me, there will be a ton of shit there. Can't take the credit but eschew the responsibility.