My favorite types of ruthless:
Lose at poker, texas hold em, blast the winner in the head.
Kill the woman used in random ambushes.
Win a dual by shooting them in the hand then executing them point blank.
Start a bar brawl, execute them when theyre knocked out.
No matter what, the Mexico portion is a bloodbath. You end up with a thousand kills by the end of the act. If you think about it, John is never a good person. His reputation for being a safekeeper is accurate, but honor isn't driven by good, right decisions imo.
You kill a thosand people plus to be reunited with your family. That's selfish as fuck. John knows that too, he isnt surprised when the military comes to kill him and his family.