Any religion or denomination can become a state religion, but only a religion which takes seriously the plurality, distinctness and cooperation of persons, can be a civil religion.
PS. On iconoclasm: “Iconic representation did provide, even if only in the very smallest corners of the imagination, a way to participate in the sacred and imitate the divine. The aesthetic representation, in other words, served as the vehicle for some kind of political representation. The iconoclastic monarch had to put an end to even this small opportunity of power and salvation. God must be completely separate from the multitude such that the Basileus is the only link between them, the only means of salvation” (Michael Hardt and Antonio Negri, Multitude. War and democracy in the age of Empire, Penguin, New York, 2004, p. 325).