Those not of our kind, surely have a different heart!
To the Hundred Clans of the Great Wasteland, humans are merely the blood food they speak of, nourishment for evolution and growth, just as Human War Soldiers struggle in the Great Wasteland, viewing the many beasts in the Savage Wilderness Forest as food, having no compassion for the food they consume. Therefore, slaughtering the human race is nothing more than an ordinary act for them.
"Gather the remains of our warriors! We, the Human War Soldiers, do not fear death. I, as the tribal chief, will surely slay the Ghost Tribe that ravages our clan to pay tribute to the spirits of our warriors in heaven!"