In America Mosques Become (Protestant) Churches

One point made in American Grace (a book I've just started reading) is that, in the U.S. the original template in religion is the Protestant congregation(al) church.  That template is very different from the pattern of religion in many other countries.  The evolution of religion in the U.S. has been for other denominations/religions to become more like the Protestant congregational  church. It may be  this is because the U.S. has a competitive religious marketplace, so every religion has had to complete with the original template.  It's the old tale: competing organizations tend to imitate each other