In any conflict the protagonists have an exaggerated sense of self-worth which reduces the worth of the opponents. An individual act of wickedness is used to represent the wickedness of the group.
'Reasonable' people are often outraged at the behaviour of the evil elements of society. They suggest that we 'should understand a little less and condemn a little more'. Dehumanisation is an attitude which surfaces when tolerance and understanding become submerged by the clamour of the righteous. The loudest voice, the strongest army wins: the loser is put on trial.
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