They always find a way to justify mass murder, and the respectable, comfortable people always stand behind it, and a government is usually doing it, with help from artisans and merchants and pretty talkers. It’s not even a capitalism thing, but a human thing. Happened when there were a hundred people and a chief. King says kill, the underlings kill, the well heeled support it, and everyone tells stories about how it had to be done. It is a very good thing that morality and gods are just pretend.