I am not sure that there is such a thing as a monoculture of "black australians". There are Aboriginals, there are Pacific Islanders, there are Indians, Sri Lankans and so on, there are some blacks of African descent. Are even black Africans a mono-culture? Africa is a big place and most of the Africans I know are recent arrivals - refugees from Sudan and so on, not descendants of Africans who arrived centuries ago.
I have no idea of population numbers. I can just say that black faces are far less common on the streets of Sydney than New York, in my experience.
One black Australian, a singer of Sri Lankan descent called Kamahl, complained about the Jacksons skit as racist. So certainly not everyone was happy. To that extent, your point is proven, though I am not aware of any poll of blacks on the topic. Or any reputable poll of Australians as a whole, for that matter.
I wasn't saying we don't have issues with racism in Australia, we do, just as I believe you do in America. To me it seems both countries are working through their issues and getting better. I also wasn't saying we have always treated our Aboriginals well. We've done some shameful things. Different shameful things, and I have no interest in discussing who is better or worse. We have both been wrong, we both strive to be better.
I was just commenting on the cultural interpretation of black facing. I obviously still don't fully understand the US context, since this thread contains posts suggesting that if they had used brown makeup it would be different, which I can't comprehend.
All I'm saying is, don't assume we are racist just because we don't have the same cultural context. Not saying we are right. Just well intentioned.