Braev Almaz - Monotonous man. Zeref стр 10.

But the problem of any invader is that with attacking Zeref calls, the defender Zeref consequences are also understood from the other side. Zerefs against Zerefs? Yes, it turns out that these are people of the same culture. The Zerefs are carrying out direct genocide. Where they go as a superior race, they kill all subhumans, so they say, so they do according to their manuals scrupulously and crudely. And those whom they want to kill do not want it at all, and they would like to avoid being killed so that the winners do not use their corpses as fertilizer in the fields. All residents rise as one to fight the aggressor. It is easier for agitators to raise the traditional people if the aggressor shows his inhuman face.