I find it interesting that you choose to go into fine detail, again, about the facts of life and social problems in the Northern Territory as you understand them and to share your own personal anecdotes, as if these have some impact on the cartoon been grotesquely racist (or not).
Please understand that even as a johnny-foreigner I'm perfectly well aware of the state of affairs in the NT. You'll note that your not the only Australian that reacts to this cartoon by earnestly explaining their understanding of the social problems of indigenous communities (though the other responding to me is also perfectly comfortable stating the cartoon is racist, but strangely chooses to respond to me, rather than any of the comments claiming the cartoon is not racist, go figure).
I'll posit that everything you mention, to some degree, is common knowledge in Australia. I don't accept that Bill Leak was genuinely trying to play an informative role here. We are also plainly ignoring the fact that this cartoon came in response to reports of aboriginal children being tear-gassed in Don Dale, so it's obviously an attempt to re-apportion blame, no?
If you'll humour me one more time. Imagine that the police-officer is out of frame, just a hand. Can you suggest anything that would make the cartoon of the two remaining aboriginal men racist? Let me help you, perhaps you could exaggerate some physical features, or include some negative stereotype? Has the author missed anything? What would you add to change their representation to be a racist one? It's fascinating that your only suggestion to turn the original cartoon from "not racist" to "blatantly racist" is the ethnicity of one character. Is it true (and it's hard I guess not to deliver this without the tone of an insult, so apologies) that you're perfectly aware that the caricature of the two remaining characters is deeply, deeply racist, it's just that you're comfortable with all the stereotypes they contain? It is racist, but it's ok, in short.
In case you're considering explaining further fine details about aboriginal life, let's say the cartoon was of three greedy hook-nosed sinister jew bankers. I've put literally every trope in I can, exaggerated every physical characteristic, every negative stereotype. Would that cartoon become not-racist because there's some element of truth the idea that Jewish people are a merchant class? And would your time be spent well explaining that to me in fine detail?
Thanks again for the conversation, this has been a fine example in my experience of discussing racial issues with Australians.