You have to remember, America was founded by religious fundamentalists and malcontents (I'm talking 1600s here), and I guess we've been a fairly conservative lot ever since. Maybe not, but I've seen people get their knickers in a knot here over stuff that people wouldn't bat an eyelash at in Europe or Japan. Your supposition may be correct.
And as for Carville being far left (my observation), perhaps I'm just hitting the extreme pieces. As I said, I read him only occassionally, like when there's notoriety involved, and that usually means an extreme viewpoint or a hotbutton issue. I usually tend to stay from editorials and columnists as a general rule. But I do like to read Richard Roeper in the Chicago Sun-Times, and Dave Barry is a hoot.
Jay CNS&M Wireheads of the world, unite!