There's a moment about 20 minutes in where Herzog finally takes his eyes off Huie's ridiculous rant. The camera pans down a street where the pavement is covered in litter and every house is in a state of ruin. In the background, Huie continues to sermonise about the power of God's love and how everything that happens is part of God's plan.
Then, for the rest of the film (except for another brief interlude of poverty towards the end), we're back in the church, watching Huie's ludicrous and energetic performance. Yet in those few seconds, Herzog has already said everything he wants and needs to say.
That, my friends, is pretty impressive (if not slightly gimmicky) filmmaking. It's just a shame we have to sit through an absurd charlatan ranting and raving for over 30 minutes in order to be told something we already know.