Woodchucker, that's pretty funny!
Of course, many tribes were horrible to each other and often made what Columbus did look pale in comparison(no pun intended). It's currently in fashion to have a romanticized view of First Nation peoples, but under closer scrutiny many tribes of that era don't come off looking to good.(just as many explorers don't)
Every nation, without exception, was taken over by someone more powerful and/or more technlogically advanced. We Greeks used to enslave those we defeated in battle(which was basically everyone:)
We are judging actions from hundreds of years ago through a modern, often distorted prism.