Can someone define "concern troll" for me?

If you’re gonna contextualise it in terms of Black/White, as an Australian I don’t have much to say about it other than it’s too fraught a situation to entertain much hope from where I’m standing… lots of bad blood there.

(Some Australians definitely have a different experience, but most of us feel very little impact on our lives from our problematic relationship with our indigenous folks - aside from inheriting a stolen continent - probably because they’re a smaller and more isolated contingent, and as for Africans, they’re only just arriving, and happily, I gather)