“Many people in the American Muslim community would hold that no one should ask for permission in exercising such a well-established American right or care what their fellow citizens think about the exercise of such basic rights. This is a profoundly mistaken attitude. The mark of a healthy, well-adjusted community is not a decontextualized defiant assertion of rights, but is instead a balancing of rights with social responsibilities includes a due regard for the sensitivities of fellow citizens.”