Just as Planned
Monodominants are an extremist Puritan faction of the Inquisition known for their uncompromising prosecution of perceived enemies of the Imperium.
As their name implies, they are of the firm belief that the Imperium, and only the Imperium, should be allowed to exist. They are zealous supporters of the concept of manifest destiny, and believe that this is only achievable by the extermination of all threats and impurities. Xenos, witchcraft, heresy, blasphemy, mutation and civil disobedience are crimes punishable by death in the eyes of a Monodominant and those accused of such crimes can expect no reprieve.
They see the Imperium’s war as a racial struggle of survival, and hope to kill enough aliens, mutants, psykers, and other “inhuman” begins natural selection will be allowed to take its course and Humanity will rise to the position of ultimate power.