Rural v. Coastal Elites
The mother, Dad and brother represent the closed minded rural side, and Madeline represents the closed minded urban elite. Both are reluctant to embrace their differences and find common ground. Only George and Ashley rise above the biases and misconceptions, and are open to getting to know people as individuals.
I also like this film because I think this is a common story. There are a lot people like George who move away, change, mix with new people then come home to the family and friends who are still the same as ever. You can see it from Peg's point of view too as a mother who sees her changed son with his strange new wife, and feels the loss of her close knit family.
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