LOL, well I'm not sure about you guys drinking tea and wearing bowler hats; but for the most part your caricature of American public is generally true. And its that authoritarianism that is intertwined with their language of "Americanism". Even though not everyone fits that particular frame, you can generally say that the American political mainstream does, maybe except for being Christian fundamentalists. You'll notice that, even though not too many people approve of Bush right now, generally speaking, in the Republican ranks and even among most of the Democratic ranks (supposedly the "opposition party"), they basically agree with and uphold the unchecked power of this administration on its own citizens, and the almost Orwellian-esque legislation of the Patriot Act. The very passing of that Act was a knee-jerk chauvinistic reactionary vote by Congress, where no one in Congress even read the act before they passed it. In a show of authoritarianism and blindness in the wave after 9/11, they just 'trusted' the President and his authority.

However, even though I think a generalization that most people in the United States are deeply religious and politically so is a false one; it is fair. Because even though religious moderates might outnumber the evangelists, the evangelists make up a huge voting bloc (the largest one that is something other than a political party in terms of organization and mobilization) with like 80 million people or something. So even though they might be a minority (a quite fat one, anyway) they do influence the political mainstream a lot. And undoubtedly the evangelism and religious extremism is indeed a force of authoritarianism and even sometimes fascism in America.