The majority of americans aren't paying much attention and aren't going to notice things are off until things have really gone off the rails, but by then it'll be too late. There's also a lot of "It can't happen here" attitude (apparently because we're special or something) which is exactly the kind of conditions that make it more likely to happen.
Living in Germany quickly made me understand that Germans were not special - as in, did not have some unique weakness that made them particularly susceptible to fascism. The corollary, that Americans did not have some innate virtue that prevented it, took longer to really get through my thick head.
