Islamic extremists have sworn to murder and pillage in the name of Allah and his prophet Mohammad. To millions of Muslims, infidels should be expunged. They interpret that the Quran demands a Holy War where murder and mutilation are essential to constructing a Caliphate.
Surrounding this evil core of several million coldblooded terrorists are hundreds of millions of Muslims that want Sharia law instituted worldwide. They believe Jews and Christians should suffer the punishments laid out by the Quran.