I accept your comment in the spirit in which it is offered. Terminology matters and it can be hard to find the correct word. It was another editor who sought to distinguish "civilised behaviour" from that of Indians; my point was that even if one accepts such a distinction, non-Indians have committed absurdly large atrocities. In addition, I could have pointed to the Mystic massacre as a completely on-point example of a butchery that shocked our Native population. None-the-less, both tribal Mongols and tribal American Indians had or have civilizations by any reasonable definition.