The day I see Muslims chasing terrorists and terrorist sympathizers out of their Mosques will be the day I believe that. At present, it sure seems like those who aren't actively attacking us are certainly coddling those who do.
My sentiments too, and based on a radio interview with the author of "The Trouble with Muslims", so would she. She is an educated woman who will be targeted for death for her views. She basically criticises those muslims in the West who have the freedom to question the radicals in their faith but do not because they do not want to cross the "literalists". She said that prior to the eleventh century there was a tradition in Islam of questioning the sacred text and that the radicals taking the mainstream has shut down this tradition. Basically muslims are held silent by fear.
The thought that literal Islam believes they must destroy western civilization in the name of their religion means that western civilization would be justified in destroying Islam. Unless people like this author make themselves heard, (and she will not sway many muslims, because she is a woman), a far wider slaughter will be necessary.