That's because history is written by the victors. It's much easier for people to imagine our patriots fighting for their freedom from the evil oppressors, than it is to imagine our local nobility pissed off because they were having to ship too much money back to England in the form of taxes. To bring the thread back around to its original post, it's exactly the same way that people are uncomfortable thinking of native americans such as Geronimo as other than vicious savages, given the fact that our ancestors constantly lied to them, took all their land, and almost wiped them all out.