There's still a self-sorting selection bias, I imagine. The kind of batshit insane person that both will answer their phone when it's an unknown number, and will then go on to answer a survey after they pick up the call.
I'm only kind of joking here.
It's conceivable that one would be proud of their country for the actions their country takes, both domestic and/or world stage. Like I'm sure the people living in those Scandinavian where a vast majority of their country is healthy, happy, and even their criminals are treated with dignity and respect can be proud of how their country has turned out.
I don't think it's a common interpretation to feel self-directed pride due to one's country. Unless, maybe, you're the president or someone who makes actual decisions for the country.