No one's suggesting otherwise. Every culture has blood in their past, "civilization" is the slow process of collectively maturing to avoid those conflicts.
Similarly, totalitarianism is a less civilized form of organization than, say, successful democracies.
Honestly if Europeans never came to the Americas there would not be losses of up to 98% of the indigenous population (depending on location). Even if disease "accidentally" killed 80%, the rest were murdered due to greed and evil.
Those events have been well documented, unlike the "rarely kept records" in your previous comment:
https://en.wikipedia.org/wiki/Genocide_of_indigenous_peoples...
After the Europeans could not find enough surviving Native Americans to enslave, they went to Africa next to start another round of cruelty. There is no honest comparison to be made between warring tribes and European conquest.
This is off. The problem wasn't that there weren't enough natives, but that they tended to die quickly when enslaved.
Britain also killed a lot of people in India, but they didn't commit genocide.
And "Indian" is an accepted, defined way to reference Native Americans. See: https://www.merriam-webster.com/dictionary/Indian