Farmer has rifle confiscated for defending his family. Home Invasion!

Bungowannah farmer David Dunstan (a licenced firearm owner) defended his family from an armed intruder (already on the run from a previous local home invasion) with an unloaded rifle and now the police have seized his licensed firearms!

Who are our police protecting by doing this? He lives on a remote property and as a farmer, his firearms are part of his "tools of trade".

 http://www.bordermail.com.au/story/4930858/you-say-firearms-are-part-of-farmers-tools-of-the-trade/

The law says we are not to use a greater force to defend ourselves than we are being threatened by. So what happens when the assailant is much bigger & stronger than the victim? Does this mean that David Dunstan should have gone to the kitchen & protected his family with a kitchen knife???!!! Get into a knife fight???!!! We have effectively lost our rights to self defence & the right to protect our loved ones, this means we have lost our freedom!
So what are we going to do about this? Wait for someone else to get killed? Do you know how many people get attacked,injured or killed each day? Australian women are getting assaulted every two minutes every day!!!