There it is, the universalizing about torture, killing and violence that are "universal" in the world.   I won't deny that Native cultures had warfare or violence.  But to assume that it was all equal is to deny the extraordinarily violent history of Europe, where for 500 years(!) tens of thousands of "witches" were tortured and burned alive.  The Inquisition, another religiously-inspired psychopathic endeavor, that also lasted centuries, killed at least 5000 people.   Followed by more of the same, religious wars between Catholics and protestants, more torture and burning people alive on a large scale throughout Europe.  Then, there was the infamous religious persecution of people in science in Europe.  

The Christian church has not in the least improved "Natives."  But we sure wish it would improve you.   That would be helpful.