“Americans are one of the most religious people in the world, particularly compared with the peoples of other highly industrialized democracies. But they nonetheless tolerate and respect the rights of atheists and nonbelievers. Unbelievers do not have to recite the pledge, or engage in any religiously tainted practice of which they disapprove. They also, however, do not have the right to impose their atheism on all those Americans whose beliefs now and historically have defined America as a religious nation.”