For the most part, all it does is give the defender a better argument: "I'm old and frail, therefore ordinary force done to me by an stronger, younger, man will inflict great bodily harm on me, thus necessitating lethal force to defend myself from the ordinary force which is effectively lethal force in my case."
Was that the case here? Barely, if at all. A shove and a grab? I wouldn't take that risk.
That depends on the state.
For the most part, all it does is give the defender a better argument: "I'm old and frail, therefore ordinary force done to me by an stronger, younger, man will inflict great bodily harm on me, thus necessitating lethal force to defend myself from the ordinary force which is effectively lethal force in my case."
Was that the case here? Barely, if at all. A shove and a grab? I wouldn't take that risk.