I think that Pope Benedict while not endorsing the form of the "Protestant Communion Service" would very much appreciate the significance of it as it concerns forgiveness and reconciliation in heaven which the Holy Eucharist is meant to signify. The brief synopsis below will help you to understand the very last scene of the movie and it is powerful, but one really needs to see the entire movie to appreciate it:
Places in the Heart
Martha Moore-Keish on Communion and Hope for Heaven
“Action adventure films like The Rapture and Left Behind get people talking about the end times. But the final scene from the 1984 film Places in the Heart offers a more biblically complete picture of what God intends for us in the new heaven and new earth.
Set in rural Texas during the Depression, the film ends with people passing bread cubes and tiny cups of grape juice down the pews. A woman passes the elements to her cheating husband. Ku Klux Klan members share bread and juice with a black man they assaulted. A sheriff, killed at the start of the film, quietly passes the bread and cup to the young black man who shot him, saying, ‘The peace of Christ.’
‘In that understated scene, the living and the dead, black and white, young and old, those who have sinned and those who have been sinned against, all sit together in the same dusty whitewashed sanctuary to share the Lord’s Supper,’ says Martha Moore-Keish, assistant professor of theology at Columbia Theological Seminary in Decatur, Georgia.
Moore-Keish often uses this film clip to explain how the layered meanings of the Eucharist deepen our eschatological understanding of how to live now as citizens of heaven.”