When is murder justified by self-defense?

[hudsoniscool]

Final-Fan said:

hudsoniscool said:

If me or my kids are in danger, I would do whatever it takes. If someone breaks into my house they are done. Honestly whether that person intends to harm us is irrelevant to me. Said person doesn't deserve the air they are breathing.

And while I'm on the subject, your stated position sounds to me like it's dangerously close to the attitude of this guy, who deserves every bit of the prison sentence he is serving. 
https://en.wikipedia.org/wiki/Byron_David_Smith_killings

I don't see how it's close to this guy. If I were inhis position would I have shot the two people who by the way yes we're scumbag trash not worth the air they were breathing maybe, probably. But what he did was obviously excessive. Like for instance if someone broke into my house right now if I had a gun on me yes I would shoot them if I felt threatened but if they saw me and put there hands up in the air would I brutally murder them, no. Rough'em up, you bet your ass I would. if I am very confident someone isn't armed then no lethal force is nessicary but if I walked up on a burglar and couldn't see his hands there is no way in hell in warning them before I either 1 shoot them in the leg of I'm armed or 2 "jump them".