What is "perfectly acceptable," according to you, rgp? Killing anyone who is attempting to steal? Or maybe a perfectly innocent person that you mistakenly think is attempting to steal? What if it was a kid, not too brilliantly stealing a toy or a can of soda, or a candy bar? Or maybe a very poor person who was genuinely hungry?
I just read a heartbreaking article in the paper written by a Black man who came home from work, only to be arrested by the police, who were waiting for him. He had supposedly stolen something. His face turned up on one of those face-recognition software systems, which matched the store's photo with an old picture of him on a driver's license. He spent 30 hours locked up in a filthy jail cell before being released. It turns out the the software is 100 times more likely to make mistakes with Asian and Black faces than with whites.
Angry as he is, he says he will recover, but will never be able to erase the image of being hauled off to jail in handcuffs from the minds of his little children, standing with his wife in the driveway.
Now, according to your logic, if one of those armed policemen decided to take him out right there and save everyone a lot of trouble, that would be OK?