I'll be honest, I think both your idea and the idea that Oompa Loompa gave about lawfare against Trump making black people like him more are false, because I think neither is the reason for Trump doing so much better among black voters than past Republican presidents.
The reason doesn't seem to be anything related to Trump himself. It's that black voters are voting more frequently for Republicans
in general, and Trump is just getting benefits from this larger trend.
To quote this interesting article I found:
Just the boring material cause, though, not the efficient or final causes.
decivitate.substack.com
I think this is looking in the wrong place. I don’t think the non-White shift has anything to do with Trump. Look at the NYT/Siena poll numbers again. Trump puts up amazing, historic numbers with non-Whites. But Nikki Haley does even better. She not only cleans up with Whites; Haley also wins Hispanics by 10 points and gets 5% more Black support than Trump does. (She does a lot worse with Asians, though.) Haley is about as close to a Generic Republican as you can get in these weird, Trumpy times. Yet she does better with minorities than Trump. This suggests that what’s attracting minorities to the GOP isn’t Donald Trump.
It’s conservatism.
That actually makes a lot of sense. In a big thread that took Election Data Twitter by storm this week, John Burn-Murdoch of the Financial Times made a simple observation: among White people, essentially 100% of conservative voters vote for Republicans, and essentially 100% of progressive voters vote for Democrats. It has been this way since at least 2012. But, among Asian, Latino, and especially Black voters, many conservative voters have spent years voting for Democrats, not Republicans. (Non-White progressives also voted for Democrats.) That’s changing.
The article goes on to give more details on this, but that excerpt seems sufficient to get across the basic thesis. If its arguments are true--and they seem persuasive to me--the notably higher percentage of black voters voting for Trump is just them voting more for Republicans in general. Granted, blacks still vote overwhelmingly for Democrats, but still not
as overwhelmingly so as in the past.