So the Treaty of Tripoli states regardin the United States Government being based on Christianity the following.
Art. 11. As the Government of the United States of America is not, in any sense, founded on the Christian religion; as it has in itself no character of enmity against the laws, religion, or tranquillity, of Mussulmen; and, as the said States never entered into any war, or act of hostility against any Mahometan nation, it is declared by the parties, that no pretext arising from religious opinions, shall ever produce an interruption of the harmony existing between the two countries.
And anyone who disagrees can argue with John Adams:
the United States, and all other citizens or inhabitants thereof, faithfully to observNow be it known, That I John Adams, President of the United States of America, having seen and considered the said Treaty do, by and with the advice and consent of the Senate, accept, ratify, and confirm the same, and every clause and article thereof. And to the End that the said Treaty may be observed, and performed with good Faith on the part of the United States, I have ordered the premises to be made public; And I do hereby enjoin and require all persons bearing office civil or military withine and fulfill the said Treaty and every clause and article thereof.
I love primary sources. And detest bad conservative historical arguments.