While liberals aren't as guilty of showmanship as conservatives (Keith Olbermann is the exception), they are as guilty of not taking politics seriously. Conservatives often resort to name-calling in the absence of debate, but liberals ignore whole categories of discussion. Like patriotism and religion. I suspect the reason is discomfort with talking about them, and I suspect that that's partly because they don't want to risk sounding like conservatives.
Well, it's time we got over that.