It’s certainly possible he’s lying.
But given what I’ve read of his other work, I’d be very surprised if he was referring to all black people.
However, being pissed off at criminals and criminal apologists is completely in his wheelhouse, and makes way more sense.
There is some possibility that this is strategic.
But I think the hypothesis that he unthikingly posted an ambiguous tweet while he was feeling emotional is more likely.
Your prior should be on people occasionally posting unthinking emotional tweets.
Your prior should be that he has a strong dislike of crime apologists, which is one of his big hobby horses.
Especially if you’ve read more of his work, like I have.
He doesn’t hate black people.
He definitely strongly dislikes crime apologists.