Great point.
I wonder if you would feel the same way if he drove his Corvette 150mph while drunk and rear ended a RAV4?
Two totally different situations of course but I'll give you my observation. Ruggs recklessly but unintentionally killed someone. Rittenhouse after firing his first shot that neutralized the threat continued to fire 3 more shots to almost guarantee Rosenbaum would die. Which would be similar to Ruggs pouring gasoline on the car he caused to go up in flames knowing that someone was inside