When one group of people denies the human qualities of another it is called. occurs when extremists push social groups apart through the use of propaganda and hate speech.

"In much of the developed world, one uses racial epithets at one's legal peril, one displays Nazi regalia and the other trappings of ethnic hatred at significant ... a libel case brought by several Puerto Rican groups against a business executive who had called food stamps "basically a Puerto Rican program.