New book to be released this spring:
Based on this
UPDATE: Lawyers, Guns and Money make a very pertinent observation
Particularly instructive is--especially with respect to foreign policy--how much of what defines an "extremist" is based on virtually unfalsifiable attributions of motivations rather than on specific policy preferences (you know the routine--"OK, you were right about the Iraq War, but you're saying that because you hate America, so it doesn't count!") ...
Accusing people of harboring bad thoughts is a classic right-wing technique.