who was the person who criticized this?
He is the former Research Professor in Genocide Studies and Prevention at the George Mason University in Fairfax County, Virginia, United States.
Gregory Stanton
Gregory H. Stanton is the former Research Professor in Genocide Studies and Prevention at the George Mason University in Fairfax County, Virginia, United States. 
what type of rock is in the grand canyon Sedimentary rock. where is this canyon located? Western North America. what is it? It is a steep-sided canyon carved by the Colorado River in Arizona, United States. who were the early settlers here? The Ancestral Puebloans. who were they? They were an ancient Native American culture that spanned the present-day Four Corners region of the United States, comprising southeastern Utah, northeastern Arizona, northwestern New Mexico, and southwestern Colorado. how dis they get their name? "Pueblo", means "village" in Spanish. what battles have they fought? Eevidence at Sacred Ridge site, near Durango, Colorado, is best interpreted as warfare related to competition and ethnic cleansing. what is this type of cleansing? Ethnic cleansing is the systematic and systemic forced removal of ethnic, racial and/or religious groups from a given territory by a more powerful ethnic group, often with the intent of making it ethnically homogeneous. has this been criticized? Yes, by Gregory Stanton. what are the reasons behind this? According to Michael Mann, murderous ethnic cleansing is strongly related to the creation of democracies. He argues that murderous ethnic cleansing is due to the rise of nationalism, which associates citizenship with a specific ethnic group. is it considered to be a crime? Yes, the forcible deportation of a population—is defined as a crime against humanity.
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Gregory Stanton [SEP] Introduction
Gregory H. Stanton is the former Research Professor in Genocide Studies and Prevention at the George Mason University in Fairfax County, Virginia, United States. He is best known for his work in the area of genocide studies. He is the founder and president of Genocide Watch, the founder and director of the Cambodian Genocide Project, and the Chair of the Alliance Against Genocide. From 2007 to 2009 he was the President of the International Association of Genocide Scholars.