When all is said and done -- our own fascists. They don't need to prance around in brown shirts or rally around burning crosses to be thugs who first gut all that is good in America and put America at risk from countries like Germany and Japan with the decencies that America imposed upon them in 1945.
America played a huge role in defeating the fascist powers in World War II because it kept a moral compass. The Axis Powers enslaved and plundered at will. Once American troops took over another piece of real estate the war was over for those liberated or conquered, barring a desperate counter-attack like the Battle of the Bulge. American troops left nobody a reason for striking back behind the lines.
Fascism is about the purest pathology that any political entity could ever achieve. We need be reminded of what Laurence Britt warned us of in several pathological regimes:
http://www.secularhumanism.org/library/fi/britt_23_2.htm With the caveats that Dubya wasn't particularly sexist by American standards and the Rove-Cheney-Bush administration could not rig the 2006 midterm election or the 2008 general election... the 43rd Presidency was awful for most of the above reasons, and inexcusably so. Take away the comic-opera nonsense, and some key players in the American Right would be very happy with a regime that mows down strikers or protesters and guarantees huge profits through wars.