I simply don't get the urge to self-segregate like that, though I guess it's pretty much like the NY towns that are mostly Orthodox. And some of the towns that built near those megachurches out west that are mostly fundamentalist. But I can't help but think this is a bad idea. (And yes, Sunnis and Shias, I'm also looking at you.)
Aside from that, I also wanted to point out this truly bizarre bit of writing on the second page of the story:
The boy who once had holes in his socks could now afford diamonds on the soles of his shoes.
Wha?? Other than the writer being a big fan of Paul Simon's Graceland album, that's just inexplicable, and it really shouldn't have gotten by an editor.