Scapegoating is a useful and incredibly powerful tool for shifting blame and advancing a mission. While unethical and destructive, the practice provides solidarity when a group is struggling for survival. The scapegoat is seen as the reason for everyone’s misfortune and sacrificed at the altar of the greater good by those in a position of power who think they know best.
It becomes generally accepted that scapegoats deserve what they get no matter how horrible the punishment. The collective campaign to eliminate a rival, oust a co-worker, or crush a competitor breaths new, although negative, life into the organization. Impassioned by a sense of righteous indignation, witch-hunters are blinded by their own propaganda and will rest only after someone burns at the stake.