The Darjeeling Limited is a family film. Darjeeling tells us a lot about how important and influential parents are to their kids—even after they're grown.
The Darjeeling Limited is a trip of self-discovery for the Whitman brothers. They start their trek as clueless, selfish, boorish boobs and finish it as, well, slightly less clueless, selfish and boorish boobs. They learn that compassion and kindness are more important than $6,000 loafers, and that genuine camaraderie is more enjoyable than whole bottles of souped-up cough syrup.
That deeper message itself is what's ludicrous, not the silly scene representing it. In a sentence, God is not a subjective ideal and faith is not something designed by humans to make us all feel better about ourselves.