Only a few countries engender that type of loyalty: Japan, England, Scotland, Ireland, France(?), Germany pre-WWII. The rest have no particular affinity outside of their family/tribe. Everyone else sure as hell wishes they were either born here or emigrated.
Btw, good catch on Boris becoming Mayor of London. I remember reading this original post years ago.
You need to add China, India, Australia, New Zealand and Finland to the list. I know plenty of Thai, Filipino and Vietnamese people who are extremely nationalistic as well. And don’t forget the most nationalistic country in the world AFAIK South Korea.