What if they have stolen your property. Do you not have the right to get it back by force? Does the value of the property matter? If so, who gets to decide that in the moment?
I've read but couldn't find again the story of someone shooting a tief to get back his VHS player and walk free.
I'm not arguing for actually using the law to shoot people: I don't ever want to be in that situation myself, but I'm saying depending on the situation you do in fact have the law on your side.