“But a niqab was different. It was not a “choice” in the manner of the consumer economy. A visual obliteration of the self, a plain black niqab was a refusal to engage in everyday modes of self-expression. The woman who wore it chose to wear it because it connected her to something bigger than the self. It could be God. It could be a Muslim identity. But it wasn’t a simple case of a teenage fashion choice, that was certain.”