What can they do?

The facts happened in the past to the indigenous popilation of Australia cannot be forgotten in the past, and most importantly cannot be simply solved with an "I'm sorry".
That's why we should think in the answer of this question: what can different organizations & the privates sector do to avoid the abuse of minorities?

And the first thing we should think in order to answer this question isn commitment, commitment from all the private sector and all the companies, because if they are not committed to the cause, all the efforts are in vain. Another step to follow is to create an organization that defend the rights of all minorities, create an organization that would be responsible for fighting for the rights of those minorities who are being neglected by the society. We have to make the world to understand that minorities also belong to the society and in fact they are an essential part of it.

Finally, and most important, is to consider their own culture, this means that we have to let them express themselves freely and not try to adapt them to the culture that has constantly tried to reject them from the world.