Why Should The British Apologize To The Natives?

After watching the movie called the "Rabbit Proof Fence" I have felt that the people in Australia were discriminating the aboriginal as an out cast, also taking their children away however, they aren't any children, their a half cast children (where a British man marries to an aboriginal woman). This unfortunate accident happened in 1930 when three aboriginal kids that was Molly, Daisy and Gracie was taken away from their mom's and taken from a camp to learn the proper way to live. So I believe that the aboriginals people need an apologized because they lived a long way to endure a hard life by their children taken away from them.