[Anitius Severinus Boethius]

The question should not be:

"Is it worth killing a man to protect X"

rather:

"Is it worth me risking my life to steal X?"

The burgler created the situation and started the chain of events that led to his own demise. If he had not broken the law, he would not be dead, but he chose to put his own life on the line when he broke into that warehouse. Therefore, the responsibility of his own death is entirely due to his own choices and actions.

[RonF]

"Is it worth me risking my life to steal X?"

Theft is not punishable by death. The deadly force here was justified by the deadly weapon (the hammer) and the threat to use it, not the theft.

Yes, this burglar created the situation that led to his own demise. If it turns out that he would have died just from shots when he was still standing, I've got no problem. But if it turns out that this guy was down and then was repeatedly shot in the back then something's wrong. But it's not clear from this article if that's the case. You have a right to self-defense, but not to vengance.