was much more a loose federation of independent states with the States supreme. However the unrecognized and rather surprising historical movement to more centralized government. In Europe both Italy and Germany were fragmented until late in the 19th Century, but ultimately unified simply because the interests of a common language group were better served by cohesion. Switzerland is still a federation, with 4 languages supreme in 4 separate languages, but rights for the other language groups recognized nation-wide. Canada too balances two language groups as does Belgium. Canada is a federation which tries to balance the individual interests of the Provinces with the central government handling trans Provincial and international needs.
"Misguided and concealed the truth" is an odd way to express his concept of the Union, however. Nor was he the only anti-religious person among the rather large group who created the Union. Since the previous three centuries in Europe were scarred by religious wars, and England had fought a Civil War at exactly the time of the founding of the Plymouth and other colonies, that consciousness of the tendency of religion to divide people was uppermost in the minds of the Founding Fathers. It was also the guiding principle of The Enlightenment, often called The Age of Reason in order to differentiate it from The Age of Faith, which essentially was the period from between 300 to 600 AD, and the late 17th/ early 18th Century, say 1650 to 1700. Roger Williams was a Baptist minister, and the foundation of Rhode Island was essentially in order to found a purely Baptist colony. A great deal of the division of the colonies in the 17th century was the separation of various sects attempting to establish their own areas of predominance.
The division between church and state was addressed by Jesus himself. "Render unto Caesar the things that are Caesar's and unto God the things that are God's." I don't think we can say either sphere is "above" or dominant over the other. They take care of different things. Religion, and many non-religious belief systems take care of the spiritual realm while government takes care of the secular, day to day, legal, interpersonal and inter-everything-else realm. If some of us neglect the spiritual that is our loss and damages us, but it isn't something that any power on earth can force as solution on, despite what the jihadis and the nutbar Islamists think.
It might be useful to remember that Islam is in its later adolescence compared to Christianity. It's still only 1400 years old, which was exactly when the religious wars among Christian countries and sects began. The great Schism, Protestantism and the Wars of Religion (meaning the Christian religion) began in the 15th Century and didn't end until the late 17th. Even the English Civil War was a War of Religion. And if that isn't depressing (i.e. that Islam is entering its period of Religious War) I don't know what is. Actually, I do think we're seeing the last gasp of Islamic conflict, though whether it will end in anything less than a century, I don't know. I think or maybe it should be I hope that this is the death throes of the lunatic fringe of Islam. And please, dear God, let it be a quick death.