"he'd be a threat to other burgulars".

If burglars felt no threat breaking into houses chaos would run rapid. The threat of a short prison stay does not adequately deter crime. The threat of an instant shotgun blast is a much better deterrent.

Hopefully burglars feel threatened to enter my house, they should. Like the old saying goes. “I’d rather be judged by 12 than carried by 6.“

I’m sure this fellow still feels that way. He had no idea what if the burglar was only a burglar or a killer too. Along with that I am sure he was terrified.