The scars left by what police described as a potential "mass-casualty event" which threatened to devastate the crowd of Perth's Invasion Day rally still run deep, even nearly six months later.That much was clear from a day of evidence reflecting on racism, hate and violence directed towards Aboriginal people given earlier this week.Liam Alexander Hall, 32, has been charged with throwing an improvised explosive device into the crowd and is yet to enter a plea.Loading...Police allege he was motivated by a "hateful, racist ideology" — a determination which contributed to a federal parliamentary inquiry being stood up.The committee's chair, Jana...