When it comes to war, no-one compares with the Europeans. WW1 and WW2 ring any bells?
So what? The Romans invaded Britain. Noone still whinges about it now.
As for environmental problems compare: global warming, landfills, massive desalination, a rate of extintion a thousand times higher, the introduction of foreign pests and vermin, the introduction of foreign diseases, etc
None of which makes your claim correct.
Any environmental impact the native inhabitants of Australia had on this continent absolutely pales in comparison to the ecological impact of the colonial powers.
How many large mammals have become extinct under white occupation? Tas tiger what else do you have?
Attempts to portray the aboriginals as some great guardians of the land are very misplaced
It is up there with the usual crowd talking of their rich oral history ie ABC speak for saying there was no written language.