"Invisible walls were also rising among communities, between neighbors, and even within families. The seeds of intolerance had been there at the outset of Pakistan’s creation, though they’d been kept mostly buried. Now, Zia was watering them generously, and the Saudis were adding fertilizer. Mehtab had grown up with Hindu neighbors; they visited each other and played together. Soon, some Sunni Pakistanis refused to even have a Hindu cook in their house, because they considered the food impure."