These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Moral Event Horizon: The execution of the two drug dealers in Dog's first scene does it for him - they've already told him everything he wants to know, and are tied up, terrified, and begging for their lives. That earns them neither sympathy nor mercy. Even Dog's own crew, who are hardly saints themselves, disapprove of this.