Fundamental Islam is THE threat we are fighting. We are trying to make the job easier by dividing Muslims along good and evil.
There are those that want to throw their hands up, call all Islam a religion of evil, and fight all 1.2 billion Muslims now.
I'd rather try to divide them and fight the 50 million or so that are lost to hatred.
This isn't Nazi Germany or Imperial Japan, with their large technical industrialized societies that we're fighting. These buffoons live in the 7th Century, if the Western world lets loose its might, we can stomp them in mere months. We just don't collectively have the will to do so yet, and more Americans and Europeans are going to have to die before their leadership gets the point that something decisive needs to be done.
I've thought that the current situation is the mirror image of WWII: US Presidential candidates were making speeches about "keeping us out of Europe's war" after Hitler had already marched through the streets of Paris. It took an attack on us to get enough of us to see that it was our fight, too. That's what I envision happening to the Europeans.