Lewis, I agree that the Aboriginal population is in decline and has been for some time.
But your original comments taken at face value give the impression they wee slaughtered by the British and this is not the truth.
Yes many died from disease, but so did many on the early settlers. Go around the cemeteries as we do and see the age of some who perished very early after the first fleet arrived.
I doubt you intended to sound as though the locals had been slaughtered by the British so I will take the posting from written material as sound.