Insofar as fictionalizing it, I feel there is nothing wrong with a white writer creating the story, provided there is extensive influence from black people in the creative and editing process. There has been. I drive Uber in black neighborhoods daily and work with black people as editors.
All the staged readings involved black people telling me that this line of dialogue or that line of dialogue needed to be adjusted and tweaked to make it seem more authentic. Then the scenes with white characters and racists were believable because they were drawn from my own experiences.