Amen to that Darth Fader. I feel exactly the same way. Dead is dead. I would argue that if you DID NOT defend your family by injuring/killing a home invader and he killed someone YOU would still bear bloodguilt for allowing it to happen when you could have stopped it.
If you are going to defend your family or yourself, why wouldnt you use the most effective means availble, a firearm.
My wife owns swords for personal defense, yet does not want a gun. Why would you not want the most effective means of defense available?