Without wading into the politics of the gesture, I'd point out that in the Southwestern US there's a strong influence of Spanish Colonial architecture, which is

Without wading into the politics of the gesture, I'd point out that in the Southwestern US there's a strong influence of Spanish Colonial architecture, which is based on a central courtyard with high walls (in turn influenced by Arabic architecture in Andalusia). Which doesn't mean that what those high walls mean now is necessarily the same, but there is a general pattern[1] 1: https://en.wikipedia.org/wiki/Courtyard#Historic_use https://en.wikipedia.org/wiki/Courtyard#Historic_use