This movie, more than being about racial issues, deals with how our biases bring out the worst in us, even in spite of how good our initial intentions are. Biases are unresolved fears. Fear kills trust. Any action resulting from a bias misleads our perception and immediately makes us suspicious, resented, and revengeful.
What a destructive path!
As for the movie? Candid, well scripted, and with a convincing cast masterfully peeling off each of the layers on this situation, until exposing the obvious!