How is this about sovereignty? You guys seem to think that sovereignty means something completely different to what I think it means. For clarity, when I talk about sovereignty, I talk about a nation's right to self determination, or a country's right to govern itself. I'm talking about territorial integrity, and cultural recognition. Not an individual's desire to pick a country on a globe and say "I want to live there" or "that's who I want to represent". That's not sovereignty, otherwise everything is sovereignty. What about my sovereign right to nail every beautiful woman on the planet? It gets quite silly if we define sovereignty so loosely.

And who are we to judge whether their reason is good enough?
An observer. I have as much right to judge as anyone else does to identify as whatever nationality suits them. It's not like I'm making decisions, I'm just making the point that it's silly. If I decide to be an Uzbek, does that make me an Uzbek? No it does not.