A lot of important/hardline nationalists were not actually born in the country that their nationalism revolved around.
Eamon De Valera was born in the USA, Sean MacStiofan was born in England. Garibaldi was born in what is nowadays France, Kemal Atarturk was born in modern-day Greece, Hitler was from Austria and, of course, Barack Obama was born in Kenya.
There's something going on here, isn't there? Something similar to the zeal of the convert, the way someone from the periphery is over-eager to assert their national identity?