Maybe where you live, but it is here. And for those that live here, that is what matters. We have the right to defend not only our lives, but from serous personal bodily harm.
I have already commented more than once in this thread, I would think if I was in that position, I would have pulled my firearm and told him to back away or I would shoot him. But then again, it can be easy to second guess someone in a situation you are not faced with at the moment. It all went down in about 4 seconds. And delaying even a second or two can make the different between being harmed more or killed when you are in a venerable position esp.