While it was almost surely self-defense and probably justifiable, the fact that many people in this thread are cheering this guy on is disturbing to say the least.
Unsurprising though.
But seriously, how could this be self-defense? The burglar was in the shed or garage! He wasn't in the nerd's bedroom.
And yes, I say nerd, because what kind of nincompoop has a sword. I've met a few of this type, usually dressed in black, and if this one is anything like those, I'm cheering on the good honest burglar.
I hope they send this goth nut to the bighouse to be properly buggered, by a long 'sword'.
There is nothing honest about stealing.