Huh?
How much victim-hood should people accept before they can put up a defense?
In NYC the line is different than Las Vegas. Morally it should be consistent.
the guy in NYC had the guy on top of him, the guys intent was not to rob but to assault. The guy in Vegas looked like he had a different deal, more of a robbery but I could be wrong.. Vegas12's point about he came over the counter is probably the biggest thing in the store clerks favor. Still it's going to be how the laws in NV are regarding self defense and how horny a prosecutor is. Hopefully the store clerk just gets a pat on his head and goes back to his normal life. Keep in mind that I don't have a law degree, I'm guessing like most of the rest of the people here.
Measure response in self defense is something you need to pay attention to to stay out of prison. I'm not saying whats right or wrong, just what might happen later. Going on Reddit and saying you play video games on how to kill people is probably not going to help. If he had just stuck to the 3 against 1 and I don't know what happened next deal, then thats a better defense.
Generally measured response is what it sounds like. Someone flips you off, you shoot them....no. Someone threatens your life, it's likely to be life for life at that point. Over simplified but you can fight for your life especially if you are cornered. Some states have castle doctrines which "I think" means you don't have an obligation to retreat. Other states will say if you have an easy way out you have an obligation to take it. Being cornered in its self I would think is a very strong defense. *IF you can....run away.. If you are defending someone else, and they can't retreat, then (I'm pretty sure) you can stay.
When it comes down to it though having a cool head in a situation like that is unlikely at best. Even if you have training once your animal instinct kicks in it's not going to end well for anyone. I think thats what we saw with the store clerk in NV....now if he could just stop talking he might be ok..