I think David Neiwert at Orcinus would probably disagree with you about your point, as he contends that the KKK was really the first fascist movement, if one uses the most succinct definition of fascism, palingenetic ultranationalism. Because of that ultranationalist component, any country's fascism is going to have elements unique to the nation (as much in the sense of people as country) that make it look different from any other country's fascism. Besides, any right-wing populist authoritarian movement, and the Tea Party is one, is going to be influenced by other successful right-wing movements, including their use of street muscle. I've told my friends on the left to start being worried about their personal safety when significant numbers of young people, particularly young white males, start hanging around Tea Party rallies. That's when they'll go from a bunch of cranky old folks to a real physical threat.