People from Rancho Cucamonga are special.
If a movie is filmed or set in their town, they unswervingly feel that the movie is better than others. Especially since it is so rare and … special.
They argue online about its greatness, and do not understand how it is that other people don't see the movie's obvious magnificence. They are genuinely perplexed.
It doesn't have to be a small town. It could just as easily be ..Scotland, although the rarity of showing Rancho Cucamonga makes it just so obviously better, and perhaps what provides the perceptual extra gravitas.
What is the exacting term for this specific kind of bias?