This is pretty interesting. You have to wonder how carefully it was edited to make the crowd look ridiculous. But, I don't know, maybe it didn't take much editing. I've never actually talked to anyone who likes Sarah Palin, but when I read stuff by her supporters it always comes across like the people in this video: full of catch-phrases, jingoistic, and appallingly ignorant.
I can't help but wonder how easy it would have been to videotape a bunch of people in line at an Obama booksigning and then edit together all the people talking out their asses having no idea what Obama actually wrote about, or stands for, or believes, or did in office. People have a hard time with the details. I think there are two things at play. One is that it's just hard to remember stuff and even harder to keep a grasp on how issues connect. Most people just don't know much about government and, whichever side they're on, can't call forth much beyond the talking points. I consider myself pretty well-informed, engaged with the issues, but if you asked me right now what cap and trade means, I'd struggle for a bit to give you a definition and to express a clear point of view about it. Especially if you were pointing a video camera at me.
The other phenomenon of course is that people are always looking for a savior and are inclined to believe what they wish were true, ignoring the evidence. Just look at how surprised and disappointed many progressives are by Obama's moderately conservative style as president.