It’s easy to blame the embarrassingly immature vitriol that Rush Limbaugh, Glenn Beck, or Sarah Palin produce for the current lack of civility in public affairs. But those who think that these commentators are compelling the crowd to do their will have it inside out. Ms. Palin, Mr. Limbaugh, and Mr. Beck, as well as their cable counterparts on the left (and there are many), aren’t so much leading the crowd as pandering to it. There was a time, when those in the media did, in fact, shape public opinion. Now, due to the perverseness of the Internet and the prevalence of high-tech polling, they merely echo it.