As a white person in a mid-gentrification urban neighborhood I'm really no more qualified to understand what black communities prefer, but the internet can offer some insight. And from what I can tell I think you're severely underestimating Trump's past and the attitudes towards him when you dismiss it as "correct speech patterns."
Give
this stream of tweets a read. It's very well-written and I summarizes perspectives I've read and heard elsewhere about Trump from African-Americans and other minorities.
In any event, I think you're right that actual policy changes can help more than words. That was not my point. My point is that words can help a little, and offering them takes almost no time or effort ... so if someone is unwilling to do even that, I doubt they have the commitment and energy needed to take on the much larger effort and challenges they would face in changing policy.