That's a bad false dichotomy. The people he shot may have been terrible people doing terrible things.
It's not only not his place to take arms to a riot, it's a crime.
Even if the people he shot were committing crimes themselves, they are dead because stood in the middle of a riot with a loaded gun, which in and of itself is a crime.
How anyone can find him faultless is beyond me, unless you are pro vigilante and think we need more armed people in the streets. Good luck with that.