[Jason isn’t repelled by Cato. He’s sympathetic to Cato’s plight. It sounds like a larger scale version of how he had to survive his childhood. No child should have had to make their first kill and yet he had to. It was damn or be damned]

There’s nothing wrong with trying to defend yourself. Kill or not kill isn’t as easy of a choice as people make it out to be. Sometimes you have to do it to survive.

There’s a quote from my world. “He who fights with monsters should be careful lest he thereby become a monster. And if thou gaze long into an abyss, the abyss will also gaze into thee.”

Meaning you have to be careful that whatever you’re fighting doesn’t warp you and turn you into the thing you’re trying to fight.