Aboriginals were an aggressive people and had superior weapons, and travelled and colonised UK because they classified UK as terra nullis to dump on the aboriginal social rejects, and UK didn't allow land to be used by all except individuals, therefore they didn't conform to aboriginal social norms for free land access for all which justified the invasion, and also the British were not enlightened enough to believe in rainbow serpent, so the aboriginals had to educate them.
After 200 years of conflict and kidnapping young English kids to be indoctrinated in rainbow serpent schools, the English became 3% of the total population and the national day is when the first boat of aboriginals arrived with hundreds of soldiers and almost 1000 convicts.
And that is something for the English to be celebrate.
