I've never felt good about killing or using extreme violence to preserve personal property, even if it's ten thousand dollars of home entertainment system..
It isn't entirely correct but I equate it with the constitution and cruel and unusual punishment. Life and limb, or such incredible potential damage that a jury of reasonable people would gasp in horror.
Theft or vandalism is one category of crime, not something that should be answered with extreme violence.
When a criminal is engaging in violence, violence that may have long term consequences for the victim, all restrictions of society end. Unlimited and unfettered force should be used.
I'm accepting that preventing burning a house Down justifies extreme violent measures.
Being slapped, or even punched, no. I don't think that without further threat of danger, extreme force is justified. Any serious, or continued attack, or a genuinely threatening action, these call for whatever action may be necessary, as believed by the victim. For personal violence, I generally subscribe to the generally accepted castle type laws, but I think that it tends to be rather liberal. I don't believe that a violent and potentially lethal force should be used against any but the most extreme property crime.
And just to be clear, property crime that also includes a genuine threat of personal harm isn't property crime. If a thief threatens a victim while stealing his television, you can just disregard the property crime in the decision. The guy aiming the deadly weapon has crossed the line into a new category, the category that should allow his victim to use any level of force necessary to protect life and health, both personal and otherwise.