I think the problem your friend is doing it that he/she thinks people will draw conclusions from his identity.

I'm Swedish. But it doesn't mean that I'll defend Sweden in a war against Norway. I have very little more in common with the Swedes who lives on the border to Norway then the Norwegians who live on the border to Sweden. However, I'm Swedish - I grew up there and I have my cultural heritage from there. That's not wrong - it's just fact