if you believe that its just them taking the purse?
answer me this. you are walking with your son. I come back hit your son from behind and he falls to the ground and is out I then(being unarmed) turn to you and say give me all your money, pills and house keys or the same fate will be fall you. your son has blood coming his head, you don't know if its serious, or not, you just that he has a concusion which in of itself is deadly or serious. you have a gun. do you draw it and to defend yourself and force me to either die or back off and flee and to render aid.
Jason, you are posting as hypothetical here, and I am extremely wary about hypotheticals posted by the cultists, like the LDS. That is because their hypotheticals are really ruses to get a "legitimate" ground for something not mentioned in the Bible, and ultimately are designed to discredit what the Bible says because the hypothetical is so extreme.
Of course, YOU ARE NOT A MORMON, nor are you attempting to discredit Scripture in any fashion. But we do need to go over what is in focus, and not go to where a common sense reading of Scripture, and applying it to today takes us.
ESV | Ex 22:2 If a thief is found breaking in and is struck so that he dies, there shall be no bloodguilt for him,
3 but if the sun has risen on him, there shall be bloodguilt for him. He shall surely pay. If he has nothing, then he shall be sold for his theft.
Wisely, Scripture does not tell us that taking this, or that in any robbery is a deed worthy of death. The only mitigating, or lessening factor in causing the death of a thief is DAYLIGHT or NIGHTTIME.. Why do you suppose causing a death during a nighttime home invasion/robbery is a lesser offense than a death to a criminal during a daylight hold up?
My guess, taken from verse 3 is that during the day, the homeowner (purse snatch victim) has the opportunity to see the face of the criminal, and bring charges against the individual. Because the stars and our moon reflecting the rays of the sun back are the only sources of illumination are relatively weak. Only those who have camped out far away from any sort of man-created light know how dark it gets. In reality, placing your hand one inch in front of your eyes when it is almost totally dark and not being able to see it is an awesome feeling.
Of course there was no homeowner who would let the oil in the lamp burn all night long. As a result, the roofed house did not let the reflected moon light penetrate. The homeowner did have the advantage because he was in his own house, so if he swung his staff in the air in a similar manner to Henry Aaron, when he hit number 715 out of Atlanta's Fulton County Stadium center field outfield fence, and the thief was in the arc of that staff's swing, there is no doubt in my mind that he could not see it, and the last sound he heard while alive was the thwack of the staff against his skull, creating a fatal concussion due to a fractured/ruptured cranium.
Therefore the phrase in verse 3, " but if the sun has risen..." means that there is daylight, and the homeowner does the same thing to the intruding thief, well that makes the homeowner guilty of murder; he took a life, and that could have been prevented.
However in the case that you made, Jason, you are comparing apples to lug nuts.Yes, the common factor is a daylight robbery, but the mitigating circumstances in the incident was FIRST a sudden and deliberate attack on your son that caused your son some bodily injury because you could his blood.
SECOND the incident also creates a threat of having similar bodily injury against yourself that your son received.
As a result, YOUR life is now in jeopardy, and killing the assailant with your Glock .44 is an act of self defense. One shot any where on the body of the assailant is fatal.
The things that are important here are not the things in one's pocketbook; they can all be replaced; but life cannot be replaced when a person is dead. So in the example given in the Scripture about the nighttime home invasion and in your hypothetical example, the killing of the purse snatcher's threats and action against your son, is not the same as murder; it is justifiable self protection/preservation.
That is why there is nothing physical that can be stolen would justify the killing of another.