The Muslim Brotherhood has already stated that they want a return of the Islamic caliphate....which, given the on going circumstances in the world today, is in my opinion, a good thing. When they're all united under the flag of the Caliphate, we can bomb them all, anywhere in the Islamic world we want and not have to worry about hitting any innocents.
It'll be like being at war with a country and not just a few "misunderstanders of Islam".