A debate! Time to stick my oar in!!!
Most of the awareness that cowboys were the "goods" and native americans the "bads" was created by Hollywood. I grew-up wearing a Stetson hat, two guns and "camperos", the cowboys' boots. We all knew that the trumpet sound would have meant "I'm safe! I can survive!".
Reality was a little bit different:
In the name of progress, they've been massacrated, locked up in the famous reservations (often deserts without food, water and grass).
Their main resource, buffalos, sterminated just for fun. Now buffalos are almost extincts. There are pictures of trains, running on the plain, from where dozens of "hunters" were shooting buffalos and leaving them there...
A good movie: Blu Soldier (or whatever is the orignal title) tells about Sand's Creek, where 500 Cheyennes (mostly kids and women) have been killed by US Cav...
It's a 1970 movie, directed by Ralph Nelson with Candice Bergen and Peter Strauss.
I was a cowboy once, now I'm redskin!
Paolo