The Federation had massacred Golyn Niis for the simple reason that they did not think of the Nikara as human. And if your opponent was not human, if your opponent was a cockroach, what did it matter how many of them you killed? What was the difference between crushing an ant and setting an anthill on fire? Why shouldn’t you pull wings off insects for your own enjoyment? The bug might feel pain, but what did that matter to you?
If you were the victim, what could you say to make your tormentor recognize you as human? How did you get your enemy to recognize you at all?
And why should an oppressor care?