No.
No.
The only time I ever sing the national anthem, or I'm ever been "proud" of my country, is during soccer football games. And that's only because the whole point of following sports is suspension of belief. It's to pretend that, somehow, these 22 guys you'll never meet kicking a football around actually matters. But outside the fantasy world of sports, i really couldn't care less.
I don't think it's necessarily bad to feel attached to some cultural identity, but it leads to so many excesses. And really, most nation states are completely meaningless. We're all the same, whether our colours are red and blue, or yellow and pink... Most borders are administrative lines drawn on a map... I don't know why I should feel more sympathy for a Frenchman I've never met than for a Chinese guy I've never met.