Very true, but, historically, there are also many incidences of genocide (even amongst those that you mention) that have, historically and, at the time been considered unacceptable. I think we are also muddying the definition of genocide. Genocide generally refers to the elimination of a particular group of people found unacceptable by the commiter (modernish example: Nazi's & Jews; Bosnia Herzegovina; Ethiopia - Hutus and Tutsies, etc...). In most of the mentioned, it was about conquest and subjegation rather than genocide. Do you agree?