Is Alan this naive regarding Islam?
He should read Belloc on the Islamic heresy, available on-line at EWTN.
I don't know how much Keyes knows of Islam, but perhaps his position is not as naive as you think.
Personally, in my study of the Koran and the history of Islam, I've been surprised at how violent and authoritarian the religion is. And I can see where bin Laden gets his justification for his actions against us, since the Koran allows for the extermination of "infidels" under certain circumstances.
But the problem is, bin Laden has no authority to speak for Islam, or to issue a "fatwa" or "jihad" against anyone, just on his say-so. He has set himself up as a modern Mohammed, without any legitimacy. Thankfully, most Muslims--at least in the US--seem to recognize this fraud, and really do want to live in peace.
Bin Laden and his followers represent a minority of Islam. But if we take their bait, and start calling this a war on Islam, bin Laden's view will be accepted by the majority of Muslims, because it will then be true.
We cannot fall into the trap of thinking of the war in bin Laden's terms. This is a war for our political ideals--those ideals from our founding of universal God-given rights.