The one that lives in Italy, obviously.
Again, I don't have an American passport, but obviously I'm an American citizen.
Sorry, move along. Citizenship is what matters.
The guy who lives there doesn't have Italian citizenship
Yes, because you were once a citizen of Serbia and Montenegro. As long as you did not relinquish citizenship of said country, sure, you can support them.
But he doesn't have the citizenship of said country. There IS no said country
There isn't a real problem with having sympathy for another nation. But if she is supporting the US over her own nation in sports, she has a huge problem.
If she's just gloryhunting then she has other problems.
An 80 year old gloryhunting because she was once saved by an American soldier?
Again, anyone can cheer for whomever they want, even if it is retarded. Why would your brother want to cheer on a nation that doesn't allow him to become a citizen?
It's not Zambia that doesn't allow him to become a citizen, it's Belgium. In fact he did follow the rules, but I wanted to make things easier for you. Years ago you lost your Belgian nationality if you gained another nationality. You had to make a choice. Today you can have both.
If you have citizenship in several nations, that's good. If you have a brother that plays for the US, that's even better. You probably should support your brother, but again, since you have citizenship in several countries, you can choose to support any of them.
No. You don't understand. You're Irish, not American. Your brother is American. Brothers don't always have the same nationality.
Yes, it is very simple. It's binary, dude. Look it up. You either are, or you are not, in legal terms.