Have you ever looked at the history of the Church Pennant flown above the National Ensign on U.S. Navy Ships? The picture is from the USS Constitution in preparation for Easter sunrise services April 20, 2014. Originally, the only authorized church pennant was for Christian worship, regardless of specific denomination. Later in 1975, the Secretary of the Navy approved a similar Jewish worship pennant.
Navy - Church Pennants (U.S.) "Since there is now a Muslim chaplain in the Navy and the crescent of Islam has been added to the cross and tablets on the COA of the Navy Chaplain Corps, we should expect to see a Muslim worship pennant added at some point in the future, presumably white with a blue crescent."
You may want to ask yourself why the only authorized church pennant was for Christianity IF there was such a lack of Christianity among our fore fathers and founders.