@givemersspls
I'm saying that the City Lord calls the shots. Decisional power and responsibility are his, not Nie Li's, no matter what advice he receives from whoever.
And here I'll add that neither of them was raised in a what we'd call a modern western democracy. Brutal and bloody justice is what's normal for them, not so called fair trials and non-barbaric punishments.
And again, so far, except for one messenger who tried to get in the banquet hall, they kill those who resist arrest. What else are they supposed to do?
(Also, the fear of revenge shouldn't be much of a consideration. Mostly because survivors are going to be tempted no matter what they do, just for the fall from grace. It's just a matter of whether they can, and dare. If anything, it argues for leaving no survivors.)