It starts with judging an entire group of people. Like you just did there.

This is a bad take, you don’t have to have previously killed anyone to become a murderer.

The Nazis managed to industrialize mass murder in the 20th century which directly reduced the amount of exposure to the common citizen. I don’t even want to imagine what a similar mindset would be capable of today.

All it takes is a minority of psychopaths and a large population of apathetic citizens.

I’ll have you know I’ve killed tons of chickens… in mine craft.

Wtf I’m not killing a chicken. You kill the chickens. That can be your post apocalypse job. Me, I’ll stick with mud peasant, thank you.