If you're in your home where else can you retreat to? Run outside? What if they have accomplices? The laws need to change, we should also consider that career criminals have a huge advantage. If a criminal breaks into your home they have the element of surprise, more than likely have experience fighting and doing these sort of things, and probably have a higher tolerance for pain and possibly on drugs. Why is a normal law abiding citizen expected to know the law better than the crown? Be able to stop an intruder and know when the perpetrator is no longer a threat better than the police? I've seen plenty of fights when I was younger where a dude gets knocked down and gets back up and eventually wins the fight. It doesn't make any sense.