I'm Pom/Kiwi, and I'm staying away from comment on the treatment of aborigines, but I will comment on the attitude of the parent who objected (in the original post.)

I'm well into reading a book called 'Eve's Bite,' by Ian Wishart, who is a journalist and co-editor of NZs.'Investigate' magazine, and I am appalled by the way public opinion is being manipulated by people with an agenda. My own opinions have been changed over the last 50 years, but I thought it was ME that was changing, not that I was the recipient of deliberate propaganda by people who are disgusting to any parent, and those who are politically active for a system repugnant to the democratically inclined, and those who are pursuing a homosexual agenda, and other activist minorities.
The book is a New Zealand book, but most of it will be easily recognised as pertinent in any English-speaking country, and anyone who has got a few years under their belt will see, as I did, how their opinions have been manoeuvred.
Perhaps the parent,-remember?-felt that they were being set up, too.
And no, I don't entirely agree with Mr Wishart's attitudes.