Protesters have shut down city streets to decry the "injustice" of Australia's most decorated living soldier being charged with multiple war crimes.Waltzing Matilda and the national anthem blared on the steps of Victorian Parliament House at midday on Sunday as about 150 people gathered, flying Australian flags and red ensigns.Attendees at the rally, organised by the far-right National Workers Alliance, turned out to show their support for Ben Roberts-Smith and other Special Air Service Regiment members under investigation for alleged Afghanistan war crimes.Some were wearing war medals, as banners and placards proclaimed Roberts-Smith a "warrior not criminal".The 47-year-old Victoria Cross...