Like a number of losers in Western countries, these would-be fanatics need something to keep them going. Your own country and personal life are both extremely substandard, so why not latch on to something you can get excited about and release all your pent-up frustrations at your nothing existence. Hate is just as big of a motivational factor as love. These people have plenty of hate and they probably hate themselves most of all. Many are easily led by pied pipers of murder like Bin Laden. But when and if push comes to shove, doubtless many of the fervent will shrink back into their previous states of smoldering inaction. That is if they are not dead from the actions of the real but much-smaller percentage-wise hardcore fanatics who will get thousands if not millions killed from their rebellion against the West and civilization.
Their has to be more than a few to cause the kind of trouble and fighting that is taking place. Their's been more than a million christians killed in the last five years in the Sudan alone.Their are over 30 different radical groups in the city of Damascus. All of these are using the cause of advancing Islam as their battle cry. Their leaders may be few but the follwers are many.
How many of them are democracies? This is why we fought communisum nazi's etc. because they enslave people.The people they rule under Theocracy are just as bad or worse off. Every aspect of their daily lives are controlled by one or a group of group religous leaders that keep them in the poverty of the six century world.
Once Islam gains control in a country, even so called moderate Islam, tolerance goes out the window. You have three choices convert, or if you are a "people of the book" ie: [Jew or christian] live as a dimi [slave], or die.