Don’t even try.
As far as I’m concerned, the whole social justice bollocks has gone too far as it is.
You just can’t win with ’em.
If you write something with a black character, they’ll very likely accuse you of cultural appropriation.
If you write all white characters, they’ll winge and whine and complain that your book isn’t “diverse enough”.
So, don’t try to appease them. Social justice warriors (the worst of them) have no common sense beyond the end of their own agendas. Incredibly unpleasant, judgemental hypocrites the lot of ’em.
At least you said you’re only a social justice progressive rather than an SJW.
In other words, write what the hell you want and screw everyone else. Only you matter. Well, you and your potential readers and most of them will not fall into the SJW category anyway.
The SJWs are likely to complain whether they read it or not. Just like the religious nutjobs did when Life of Brian came out. Complain without even seeing it.
Just as the easily offended did with the Brass Eye Paedophiles special. Thousands of complaints. None of them saw it. It was hilarious.