I agree with some of this, Yoji; but not all. Yes, the presence of weapons raises the stakes in any confrontation.No, you do not need a gun to evict a home invader.But what if this home invader is armed as well? How doyou know if this person is going to shoot you or not? You don't. You can't possibly know.(Until the weapon is actually discharged).All i am advocating here on this issue is more clear, concise legalese from the Supreme Court(as this seems to me to be a very important issue- just ask Mr. Martin how important it is)to define "bearing arms" as meant by the Second Amendment.
It seems to me that this man was put in the unfortunate position of being the victim first; and then chose to take on the role of law enforcement by deciding to shoot the burglar. Fluffmeister has pointed out that since the burglar's back was turned; now Mr. Martin chose to shoot instead of relegating this to the police. This was a bad situation made worse, by unclear law.