The anger is about a sense of betrayal. The reason you don't understand it is because you are looking at it from a rational perspective. But it is not rational --it's emotional, and at a fairly primitive, pre-rational level at that. It is all about attachment. Big Daddy promised to make it all alright, but he didn't. People are projecting their attachment fantasies on politicians (and on God --why do you think Religion is doing so well in the Bible Belt?) and politicians (and Preachers) are letting them --it's how you get the votes and the money. The flipside is that when promises are not fulfilled, you better blame the other guy quick (Satan, or the other political party, which is the same thing) or people will flip on your ass. It's like Fable: Everybody loves you/Everbody hates you. All the other stuff is childlike thinking as well: the world is divided in Good Guys (us) vs Bad Guys (them foreigners), sentimentalism over Mom's apple pie, family values and a simpler, more honest way of life and close-knit community that never really existed except in the misty-eyed vaseline-lens retrospective of naive childhood memory; glorification of guns and tits while getting freaked out by real sexuality, monster trucks and super-size me, who dies with the most toys wins. There is a reason why the US has an obesity problem, an education problem and doesn't like sharing with others and won't play nice with the rest of the world.