Look, your description of extremism sound identical to words from the Koran about how an honorable Muslim should live. No reason to quote it, just as there's no reason for you to argue that a Fundamentalist (and you picked that term, not me) doesn't believe in these sections of the Koran. "everything I stand for is righteous, and I must kill those who believe otherwise" sounds like basic Muslim teachings.
For one thing, when a Muslim is sitting with you at Denny's, he's not acting as a good Muslim in the eyes of Mohhamed, now is he? He wouldn't make it very far in the eyes of most Fundamentalist Islamic Mullahs.
Prof. Kimball and the Christian Science Monitor aren't suggesting there's much of a divide if they're claiming both want a Shari'a State. Now, Shari'a itself isn't a dangerous concept. They are just religious laws....but the stonings, and woman & non-Muslims as second class citizens ARE key Shari'as which stem from Koranic verses, and again, they follow the ideals that you describe as being on par with animals.
Now I don't know what we call people like Shake Pallazzi
http://www.amislam.com/ or other traditionalists who come to the table with moderate views, for modernized interpretations of the Koran, and condemn Wahhabism. "Fundamentalist" seems wrong, and their movement, while growing isn't reaching many Muslims. Even your typical Denny's eating, nice guy living in America Muslim.