Evidently you weren't paying attention: You involved the Inquisition, before this little episode even happens. Sera made a suggestion that you march some troops through, and you evidently thought that that was a good idea, because you did it. Now that there's backlash what, you want to wash your hands of it? Sera cannot make war table decisions for you, you, the player, actually have to make those decisions. You made the decision to send the troops, or you wouldn't get this little episode, so that NPC's blood is on your hands as much as Sera's, and I'm not talking about Harmon, I'm talking about the NPC he kills. So it's ok for that lord to murder an unarmed man in your presence, and then attempt to kill you, but it's not ok for Sera to kill him?
Sans Harmon's interference, it would have been a march through to intimidate land grabbing nobles, followed by some kind of gifts from the friends. Instead, it's a dead friend, and Sera's very emotional reaction to it, despite all the claims that she doesn't care what happens to the little people.
No. You didn't read all the comments. That is not what I said. What I said was the right course of action is exactly what I did. I had the Nobility perk and took his lands. The game allows you to take people to court and not execute them all.
If you follow all my comments, I stated that first.
Your comment: "I'm not talking about Harmon, I'm talking about the NPC he kills. So it's ok for that lord to murder an unarmed man in your presence, and then attempt to kill you, but it's not ok for Sera to kill him?"
Please follow the thread and logic behind this.
As I explained when an NPC attacks you, you attack and it is self defense. If the NPC stops attacking you, it is no longer self defense. You are now the executioner. That is why it is always a good idea to get the nobility and history perk.
The same situation happens in Western Approach one of the attackers doesn't die. You can take him to court. It is a civilized approach to this situation. It beats killing a person who is not fighting back at the time. When the man starts talking he had already surrendered to your judgment and was pleading his case.
So if you are okay with executing an unarmed person after he surrendered than that is your choice, but not the only choice. I also didn't kill the Duchess. She went to court. My first comment is a reply to a person who stated they were playing a diplomatic character. In that case the Nobility perk would have suited their needs nicely. It is all about play style.
Diplomatic meaning: Maintaining good relations between the governments of different countries. Also employing tact and conciliation especially in situations of stress. Skilled in dealing with sensitive matters or people; tactfully.
There are situations where Nobility knowledge can't be used for a Diplomatic character. This is not one of them.