Response : Even some ostensible supporters of church/state separation think America is or was founded as a Christian Nation and this belief is very poplar among Christian Nationalists, Christian Supremacists and all opponents of church/state separation.merica is Not a Christian Nation. These appear to be some of the intended meanings which people seem to have in mind: 1  America was founded on Christian doctrines, beliefs, traditions. 2  America was intended to foster, promote, or encourage Christianity.