People as a whole don't want governments to kill people en masse', but that's grounds for legally banning it. From where are you gathering this moral source of justification?
The same place - people... But not just the murderers, the victims too, and everyone else. If the only people who want the government to commit mass murder are the murderers, then they may have the 'legal legitimacy' but not the moral legitimacy. Basically no one wants to be murdered, that universality creates a moral source of justification. Now of course we can think of situations where someone wants to die, but caveats dont negate the principle.
Before and after the Nazis, their behavior was morally reprehensible...yet they considered themselves morally sound. There must be basis for rejecting some "moral legitimacy" and not others. Or more usefully, there must be (and is) coherent reasoning to prefer legal legitimacy that dictates that it is illegal for a state to perform such acts as the Nazis, and quite a few lesser evils.
Did the Nazis want to be murdered? No, so they'd have to violate the golden rule to murder others. Their hypocrisy is the basis for rejecting their 'moral legitimacy'. Thats why not even a majority of opinion can define morality. If the majority is doing to others what it doesn't want done to them, they've lost the moral high ground to their victims.
The whole point is that both sides can claim moral legitimacy, so saying "moral legitimacy > legal legitimacy" has no more meaning than claiming "moral legitimacy > moral legitimacy" or "legal legitimacy > legal legitimacy". All this accomplishes is to duck having to provide the basis for asserting legitimacy.
But only one side can be right. If both sides dont want to be murdered, then the side committing the murders loses the moral legitimacy argument.
It depends whether the shooter knows that customer is armed. It's a relatively obvious move to shoot the people who might shoot back first, though I don't know how many people engaging in mass shootings have their wits about them sufficiently to pick this way.
Takes time to survey the crowd, but if people are carrying he cant get more than one or two before everyone else is alerted.
LOL...the one who doesn't drop their gun is the one who wasn't caught in the blizzard of lead they unleashed at the same time one of them might have muttered something, maybe. If they come in, they are coming in hot. However, it is far more likely they just set up out front and yelled "throw out your guns and come out with your hands up." Who you figuring is gonna follow that instruction?
The innocent ones... I'm not aware of cops shooting innocent people at mass shootings in large enough numbers to warrant your concern. And I doubt cops are trained to stand around outside while a shootout is ongoing inside. I think they do try to enter the store cautiously to identify possible targets. Sure its possible they'll shoot an innocent person, but they understand that and proceed with caution.
When cops go in hot they want the element of surprise, rushing into an ongoing gun battle seems dangerous.I have heard of undercover or off duty cops being shot in such situations but they're rare and certainly a price to be paid compared to the loss of life during these mass shootings.
BTW, if a shooter came in the front of the store and started shooting people standing around fondling cans is a pretty stupid response. Probably about the same as standing around fondling the steel security blanket that the gun nut brought with them. Shooter comes in the front, stay low and go out the back, you have no obligation to defend a grocery store. Oh, and establish some distance from the gun nut from your aisle who should be doing the same thing just in case the cops are out there, because they're very likely to shoot him when he comes out and only slightly likely to shoot you.
I already said getting out is the best course of action in #89:
I'm operating under the assumption I'll be safer near an armed customer if a shooter enters the store and starts killing people. I'd be safer getting the hell out of there, but in my scenario I dont have that luxury.
And yes, if I heard shots I'd grab some baseball sized cans and start heading the other way looking for an entrance. Or maybe...just maybe, I'd feel compelled by the screams to head for the shooter and try to nail him with a fastball. I cant say how I'd react, I'd like to think I'd try to stop the killing. If I had a piece on my hip, I'd feel much more confidant of my chances. If the guy near me had the gun, I might grab some cans and follow him into the fray.
If armed people in the crowd at that Las Vegas concert were shooting back at the guy in the hotel, they may not have hit him because of distance and difficulty of the shot, but once he realized he was being fired on he might have become distracted allowing more people to take cover.