The Founding Fathers justified the revolution with reference to God-given rights but when it came to designing a system of government they wanted the government to have nothing to do with religion. Indeed, in Article VI of the Constitution they declare that “no religious Test shall ever be required as a qualification to any Office or public Trust under the United States.” The first amendment to the Constitution contains a clear statement that “Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof.”
Rather than establishing a system of government based upon Christianity or any other religion, the Founding Fathers demanded strict religious neutrality from their new government and its officeholders. They viewed religion as a matter of individual choice which should and must be forever free of government coercion. They understood that the government that could compel one religion could just as well compel adherence to another or none at all.
Our Founding Fathers wanted government officials to exercise strict neutrality with regard to religion when carrying out their official duties. That means you, Doofus Donald. You took an oath of office swearing to protect and defend the Constitution. So, when acting in an official capacity as President of the United States, shut the fuck up when it comes to religion. Keep your religion to yourself. You have a Constitutional obligation to do so.