A person plants an IED yesterday and kills 5 Australians. The next day on his way to pick up some more IEDs to plant along the road meets up with an Australian walking along the road. The Australian says, hello, you are unarmed so on your way, and have a nice day sir.
Now turn that around a bit. You are the Australian soldier walking down that street. Those 5 Australians who were killed were your mates. You meet up with that guy walking down the street...how are you going to feel, are you going to be able to hold back your angar, your emotions...or are just going to put a bullet through that bustards head. But wait, he is unarmed!!!