What you tend to do is to argue, even if you don't have a good basis. There is no established church in the United States, and there never had been one. Apples to oranges . . .
Were you having a crack at me there? And bringing the Church Of England into the equation? And as for the apples/oranges thing, what is that all about?
I was talking to a Reform rabbi a couple of weeks ago about this very topic, and he said he thought that people's faith waxes and wanes, evolves, and changes. The God he believed in at age 20 is not the God he believes in now. I work with a Muslim guy who says likewise. As for the Anglican tradition, in which I was brought up, that ten percent seems a little low, and my wife, a Roman Catholic agrees.