Just as
not all white settlers to the Americas were bloodthirsty, greedy imperialists so were the Native Americans a diverse lot. While there were certainly tribes that had that evil side to them, there were also many that lived relatively peaceful existences.
For you to somehow insinuate that they all had it coming because some practiced ritual sacrifice or scalping of their victims shows a light into your own whacked out mind, not an accurate depiction of history.
There were positively evil acts carried out by men of all cultures in our history and nobody should be proud or happy of all the steps in America's evolution. A bit of humility in replying to something like this would go a long way.
Art