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.
When people are brainwashed not to identify themselves with a flag and a nationality, it disrupts the human connections and communications that need to take place within communities. It pits the indoctrinated person against the entire society and his own countrymen, and develops an "us versus them" mentality.
This view brings with it a wish for waging jihad against one's birth country. It creates the priority -- if the country attacking it is ruled by shari'ah -- of joining the enemy to fight against one's birth country.
Several years ago, when first in the United States on a teaching scholarship, one issue leapt out.
A man asked an innocent enough question: Where I was from? I told him; then, as a courtesy, asked him the same question.
"I am a Muslim," he smiled.
Thinking that perhaps he had not understood the question -- he sounded American or English -- I asked if he was from the United States.
"I am not American," he said again; "I am a Muslim."
I subsequently learned that he was an Islamist, a preacher of strict religious teachings, and that many of the people to whom he preached held the same views.
In Iran and Syria, where I was born and raised, I had never before heard this answer.