Answer by M. Lawrence Key:
Depends on who you are. If you're a fundamentalist Sunni Muslim, then envisioning this kind of thing is the culmination of your faith, bringing the "kingdom of God" to earth, to use a more Christian terminology, or creating a utopia, to use a classical one. It is bringing into being the half-remembered with vaseline on the lens Golden Age of Islam without a clear understanding of the social/political/religious tolerance that allowed that age to exist in the first place. That is a dream that people are willing to die for, however misconceived and misguided.
If you're not a Sunni Muslim in this imagined paradise on earth, you're out of luck, relegated to second class citizen status at best, forced to convert or die at worst.