I read here, that some of the people making comments, are quoting scriptures to do with the law. We do not live under the law. We live under grace.
Instead of asking us, a group of sinners just like yourself for an answer that will be just as carnal as your own. Why not ask yourself, (WWJD). What would Jesus do? Can you see Jesus reaching for a gun and defending His belongings, or Himself? I certainly cannot. Aren't christians, those of us that have taken up our cross to follow Him?
Let me ask you this. Are your belongings worth more than another man's life? No matter how wicked the man is, we know that the man is worth more than "stuff".
Now what about a life for a life? What would be the benefit of taking a life in order to save your own? Where is the glory in that? Are you not going to be with the Lord upon departure from this life? Is that not the goal? What about the other man? Would it not be better for you to go and be with the Lord. Than for him to spend eternity separated from our Heavenly Father? It may just be this sin of taking another life, that brings this man to a state of humilty. Where the Lord can show him mercy, and ultimately save him by grace. Wont this bring the most glory to God? We are all the same. Sinners, just like this man. That is why we need to ask, " WWJD" ...................?
The problem with asking "WWJD" is that it's subjective and allows one to impose their own beliefs or will on Jesus, as you've just done here.
Rather than ask what Jesus might do, the question should be, what does the Word of God say?
Anytime one of these threads comes up, some people like to act all noble and say, "Oh, I would gladly sacrifice my life so that one day, the killer might be saved". Don't break your arm patting yourself on the back.
What they never want to explain is why they think it's noble to refuse to protect their family or other innocent people in their house.
I have no problem at all saying that if somebody breaks into my house and I think for a second that he poses a threat to my family, my dogs, or me, he'd better be able to run faster than 1500 feet per second.
What's more, as a Reformed believer, I have no such illusions about sacrificing myself so that the killer might be saved later, because I understand God's sovereignty and understand that God ordains the day of every man's death, including the unregenerate.
If a unregenerate man is killed breaking into a home, it's only because that's the day God has decided he should die. God takes the unsaved every day.
It's tragic, and I would much prefer that it not happen, but better him than me or my family.