From the article:
"For islamists, non-muslim land is different from muslim land. Many can never identify themselves with a Western land -- or with a flag or nationality -- even though they may have been born in that land and their families may have lived there for generations."
....and this is why ALL muslims who currently reside in dar al-harb must be returned to dar al-islam.
Either voluntarily, or... by force if need be.
If you don't know what "dar al-harb" and "dar al-islam" mean, you'd better find out.
If you don't, you may come to understand what dar al-islam REALLY means for infidels...