There are kooks in politics, probably not as many as we think because they get a ton of press. Moderate voices are drowned out and the message is lost. The fact, and I believe that it's a fact, that this nation doesn't have a true "journalistic media" anymore to keep politicians in check and get us the real story is, in my opinion, the main reason we have arrived at this point. Maybe it's not but it's damn close.
Each side has cheerleaders for each sides respective audiences, they both edit things, take things out of context and do their damnedest to protect their own interests as well. They are for-profit businesses. I can't tell you how many times I've seen posts on any number of boards that go like this "Well, so and so edited that tape, fine, but the so and so news network does it all the time!" Same thing with politics.
I actually think that I get more thoughtful discussion on this board than I see on TV regardless of what channel I'm on. You have to wade through a lot of All-caps posts, general zaniness and the like but it's there. I believe most of us get whats going on, we just it through a slightly different prism and that is reflected in our posts.