However theres nothing wrong with feeling some pride at the place of your birth and for the land you call home.
The issue is what we would call "Watan Parastee" Homeland worship.
We all live under the same sky, plenty of room for everyone and Islam certainly is a universal faith and does not support nationalistic sentiments, however national identity and pride in place of birth as well as tribe are not expressly forbidden in fact some would argue they are encouraged equally in Islam.