Racism is such a delicate issue to work with.
And efectiveness is very crucial in efficiently delivering the message conveyed in the story to audience.
I have not yet seen this movie, but to see your review that they did well to portray important lessons such as hard-work, persistence, perseverance and love, makes we feel drawn to it.
And to see Samuel L. Jackson and Anthony Mackie together on this movie gives "gonna be lit" vibes.