Cloak&Dagger
Definitely Insane
Even setting aside that her justification is that 'my father was killed while in the process of saving the entire world' lol, suggesting that a person should be at peace with the death of their father because of the laws of combat or whatever is just a touch silly.
This is not a story about who has the most moral justification for their killing spree or who would win in a military tribunal, it's about the seductive force of hatred and how violence can't protect you from grief. Real missing the forest for the trees vibe here.
If one of my family members was killed in the middle of murdering someone, I would not be particularly upset about it actually. It's extremely hard to have sympathy for Abby's vendetta.