Allahpundit is obviously right about the ceremonial deism part. And I’ll be the first to admit that this strange American habit is bad for church and state alike.
But it’s absurd to suggest that the National Cathedral is only “nominally Episcopal.” It’s the seat of the Bishop of Washington, who leads a large diocese. It’s the seat of the presiding bishop as well. A whole lot of people worship there each week, at services that would be hard to mistake for blandly nondenominational….
…the construction of the cathedral was a joint effort between the Episcopalians and civil authorities. It’s an institution that has long had both a sectarian function and a secular one.