You were making assertions about who was first and the evidence suggests that homo sapiens arrived in Cyprus first.
The evidence sugests the opposide. Everything else is your own assumptions.
In about 10,000 years, I bet no Australian will know who their ancestors are. Everyone's ancestry will no doubt be a blend of many. Therefore, there will exist an Australian ethnicity encompassing all, and I put it to you that they have managed this already. Australia will not be English and is not English today and who in 10,000 years who will not be able to claim Aboriginal Ancestry? Can anyone guarantee that they don't have Aboriginal Australian ancestors?
So white people in Australia who will speak English and have a European culture will claim that their ancestry goes back to pre-historic Australia? The Aboriginals today are 2.5% of the population of Australia. Are you saying that when you mix this 2.5% with the 97.5% the result is Aboriginal Australians? That is like saying the if one of your great great great great great grandparents was Chinese, and everybody else was English, that you are Chinese and not English.
The fact is that the aboriginal population is tiny, and therefore it is them who will be eventually assimilated into the majority, not the other way around.
Beyond that, what label you give to the population is irrelevant. If you call "Australians" the White English speaking with European culture residents of Australia, this will not change the fact that most of their ancestors came from Europe and not pre-historic Australia.