I’m with you. It’s sometimes hard to understand WHY people are motivated the way they are, but it’s easy and important to understand that it is SO.
The great Khan would pile up the skulls of his conquered enemies so that people could see them from a mile away. In an age without mass media... what better way to send the message that ‘you will die, if you do not submit’? This is pure and unalloyed terror and PR worth its weight in gold!
Much of this behavior has been bred out of humanity or criminalized by mutual consent, but if you force individuals into a desperate corner or engage backward peoples on the ground ...they will revert to type. Count on it!!