The founders and framers of the Constitution certainly did not declare the Colonies or the U.S. as a Christian nation.
The simple fact is that "America" was already discovered and that a society with a form of representation here!
https://www.pbs.org/native-america/blogs/native-voices/how-the-iroquois-great-law-of-peace-shaped-us-democracy/
Iroquois Confederacy and the Great Law of Peace / United States Constitution. Their constitution, recorded and kept alive on a two row wampum belt7, held many concepts familiar to United States citizens today.
Iroquois Confederacy Restricts members from holding more than one office in the Confederacy.
United States Constitution Article I, Section 6, Clause 2, also known as the Ineligibility Clause or the Emoluments Clause bars members of serving members of Congress from holding offices established by the federal government, while also baring members of the executive branch or judicial branch from serving in the U.S. House or Senate.
Iroquois Confederacy Outlines processes to remove leaders within the Confederacy
United States Constitution Article II, Section 4 reads “The President, Vice President and all civil Officers of the United States shall be removed from Office on Impeachment for, and the conviction of, Treason, Bribery, or other High Crimes and Misdemeanors.”
Iroquois Confederacy Designates two branches of legislature with procedures for passing laws
United States Constitution Article I, Section 1, or the Vesting Clauses, read “All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives.” It goes on to outline their legislative powers.
Iroquois Confederacy Delineates who has the power to declare war
United States Constitution Article I, Section 8, Clause 11, also known as the War Powers Clause, gives Congress the power, “To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water;”
Iroquois Confederacy Creates a balance of power between the Iroquois Confederacy and individual tribes
United States Constitution The differing duties assigned to the three branches of the U.S. Government: Legislative (Congress), Executive (President), and Judicial (Supreme Court) act to balance and separate power in government.