Those are richies that made their goldy-gold by killing poo-poories who can't fight back in court or would die while doing so. The punishment is only fair if you look at it that way.
Meh, regardless of the details, I don't think letting bespoke vigilante justice run amuck turns out well for anyone but I guess we'll see.
Since when is shooting a guy that is actively killing people illegal?
Generally, in self defense classes, they teach that you shoot (or whatever method you choose) to stop the threat, not that you are suddenly entitled to become judge jury and executioner on the actions of the person you're taking down.
Again, not delving into the details here, just a high-level view. There are way too many crazies with some very skewed views of who has offended them to let the leash off on this kind of thing IMO. On the other hand, this is NYC so they may be crazy enough to do it and the government is doing a shitty job of making these companies meet their obligations. 2025 gonna be lit.