Scarlet Crusade

The Scarlet Crusade is a major enemy faction in World of Warcraft, originally fanatical enemies of the Scourge and the Forsaken they would ironically become Undead themselves in later expansions of the game: yet still believed they were chosen by the Light to exterminate all "evil" from Azeroth, either unaware or uncaring of the evils they inflicted upon the innocents in order to do so.