Black voices for Trump are white people and paid black actors. The white people are racist, the black people probably doesn't even want to be there but need the money
Edit: sources
About paid actors in the 2016 campaign;
https://youtu.be/s8AeQ6MpluY?feature=shared - MSNBC news clip
https://www.businessinsider.com/trump-aide-says-paid-actors-for-2016-campaign-announcement-2021-7
And then there's the ones who are literal cult members...