"Fanatic" is a loaded and misleading word. Is an American soldier sacrificing his life in defence of his country a fanatic? Or is a person devoting his whole life to help the poor a fanatic?
If you believe that Islam represent the ultimate truth and the God/Allah wants you to fight for the submission of infidels with a sword and you act on it are you a fanatic?
Or if you believe that you should give away everything what you have to the poor and follow Christ are you fanatic?
Or if you believe that getting rich is the ultimate goal and you work 80 hours weeks to achieve this are you a fanatic?
Or if you are zealous physician who works even harder the businessman for little money, are you a fanatic?
I thing that problem is not with the degree of zeal and commitment but with the CONTENT of your beliefs. If you believe in something good and beautiful and you live according to it your life will be good and beautiful. But if your belief in something not so good that of course it is better if you are not a "fanatic".
The most commited Christians try to emulate their Teacher to become meek, compassionate and loving, even to their enemies, to turn their second cheek and return good for evil. They can become monks, nuns or even hermits.
On the other hand the most pious Muslims will try to emulate Muhammad who was waging wars, capturing people, robbing and slaughtering his enemies.
But majority of the people will be lukewarm and "moderate" so the "average" Muslim and Christian will not differ that much.
But the social climate in which the people love is much "warmer" and "immoderate" than the one to which the average Christian conforms. Do we even ring church bells to sound the hours anymore(they were originally calls to prayer), do most places even observe closing hours on Sunday. Even in "secular" places like Istanbul, Muslims are constantly reminded of their religious duties. Furthermore, I think the consensus is that fundamentalism is stronger today than it was fifty years ago, because Islam--unlike the Judaism-- has never gone through an "Enlightenment." Thus Arab nationalism, ewhich was supposed to supplant Islam as a unifying force Arabs, has had to give way to a resurgent Islam. You can see this in the PLO: its radicalism has become more and more religious in tone.
"I believe that many men are bad, a vast majority of men indifferent, and many good, and that the great mass of indifferent people sway this way or that according to circumstances, one of the most important of which circumstances is the predominance for the time being of the bad or good."--J.F.StephenIt still doesn't follow, though, that the states of indifference of one versus another group are in any way equivalent to each other in substantive terms. It's just saying that between the extremes in any society (and the definition of what's extreme is most often underlaid with assumptions that never reach the light of day in the mind of the person making the definitions) there exists a large number of people who don't readily go one way or the other but can be persuaded to do so. All things considered, one culture/religion may be much more predisposed to one type of extreme than another. And we've seen that in action. Look at the picture of the little boy with his suicide bomber outfit on. Look at the pictures of the little boys carrying both real and toy guns shouting "Slaughter the Jews!" Look at the culture whose Sesame Street-type kids program for pre-school features praise for suicide bombers. If this is only the extreme of this society/religion, then its average is still way different from the average of, say, that of a New Zealander or even an Israeli Jew.