Protag: "Nope, I don't wanna to stoop to his level by killing him."
Soldier1: "But sir, he committed genocide."
Protag: "He knows, what he did. Now he'll have to live with it."
Soldier2: "Hero, the "mustache twirlingly evil antagonist" just killed the King while you're talking."
Protag: "That's okay, he knows what he did. Now he'll have to live with it."
Soldier3: "Hero, the "mustache twirlingly evil antagonists" just killed your father who wanted revenge for the Kings death."
Protag: "Th-that's fine, he knows what he did. Now he'll have to live it."
Soldier4: "Hero, the mustache twirlingly evil antagonists" just killed your girlfriend."
Protag: "Rawrrrr, she was in my harem. I'll destroy this evil villain to save the country."