People are inherently self servient. No doubt they cop a serve but minority groups whom have substantially lower lifestandards are generally not so resented because they are generally not so subsidised. Generations of injustice can not be undone by a surge of goodwill. But most people lose interest in trying to remedy the problem very quickly when they don't see immediate results.
In the past thirty years we have taken huge steps in the right direction, at the cot of the taxpayer. It is only when individuals like Katie come to fully grasp the extent of the injustices and ask themselves how they would feel were the shoe on the other foot then we can expect the patience and neccessary goodwill to bring these too estranged cultures together.
The barrier to this is democracy, when politicians wish to court votes and can do so by playing on the inherent demons that people are trying to supress, ie their impatience and selfishness, then new a whole new set of problems emerge. And ofcourse when the immigrant Australian community makes open statements of resentment, the indigenous people are going to be less inclined to try and break down the barriers themselves.