I am always of the mindset that the intruder has the option NOT to enter someone else's property.
If I'm on the jury, and it's not proven that they did previously know each other, I'm going to let him off.
The man that waited in the basement and killed the 2 teens should not have been charged in my opinion. He was retired and had been broken into several times. He deserved to be safe in his own home. He had lost his peace of mind.
I know that my opinion is not popular, but it is how I really feel. Criminals have to take responsibility for their actions. If you get yourself into a mess and you end up dying, well, you made a bad choice.
MOO
While I agree with you that the intruder has the option not to enter someone else's property, Bryon David Smith went beyond defending his property. He set up an ambush for them. He moved his truck so it looked like he wasn't home and then waited to execute them. This quote isn't describing self-defense:
Then, after he’d delivered the final, fatal shot at close-range under her chin, he whispers to himself, appearing to practice statements he would give the authorities when they came:
“I refuse to live in fear. I am not a bleeding-heart liberal. I felt like I was cleaning up a mess . . .I was doing my civic duty . . . I don’t see them as human. I see them as vermin.”
http://crimefeed.com/2016/11/a-mans-home-is-his-castle-byron-david-smiths-thanksgiving-day-murders/