Background... you have an enemy who just does not like you. He's rather pissed that you exist and have decided to do something about it.
Your enemy sends five goons to "teach you a lesson". With luck and a bit of skill, you put the five in the hospital. You have no injuries.
Your enemy sets up a marvelous death trap. You manage to detect the nefarious device. You prematurely trip the switch. Ten of the enemy's henchmen are killed in their own death trap.
Your enemy is getting really serious. He puts one hundred of his best soldiers in an air transport. You sabotage the plane. It crashes, killing all aboard.
You face your enemy face-to-face. He is at your mercy. He begs for mercy. You have the option of handing your enemy over to the authorities, banging him around a bit, or just killing him.
Each of the henchmen crippled or killed had fathers and mothers. Many had children and other loved ones. While some were really bad asses, others were doing a job to support their families.
Given who you are now, would you be able to embrace each situation? Could you carry all the way through to the end situation? How would you resolve situation 4?