Fred Clark at the Slacktivist has a good post about Rick Perry’s horrible ad and what it does to public perception of evangelicals.
The short version is that Perry offers lies about the current state of religion in the country (e.g. students are, in fact, able to pray and celebrate Christmas at school — Perry falsely says that they cannot.) Perry does this in order to appeal to the persecution complex among a certain set of religious primary voters. Fred Clark acknowledges that evangelicals aren’t monolithic and aren’t all like Rick Perry – but that they advance the perception that evangelicals are like Perry when he pretends to speak for that set of believers and is not rejected in any public way.