Was it merely coincidence that the WCF was revised by Americans at the time that several States were holding their Constitutional Conventions seeking ratifying of that document which forbade the Establishment of Religion?
No.
The revisions were carried out @ Philly at the same time that the rebels were meeting there.
It is important to keep in mind that *only* 13 of the colonies rebelled (Upper & Lower Canada as well as Nova Scotia stayed out, albeit with some localised fighting by a few rebels).
The only delegates that contributed to the "American" revisions were from the colonies then in rebelion. Since support for the rebelion only ever extended to 1/3 of the population of the 13 colonies, and since the 100,000+ Loyalists that relocated were from the merchant & upper classes (thus more likely to provide the leadership in both church & state) I have often wondered what the effect would have beein on the subsequent development of the US form of Presbyterianism.
In other words,, if the only people that sent delegates were already functioning as proto-2ker's & since those elders (& future elders) that would have provided the bulwark against such (in my opinion) inovations, left the (newly formed) country rather then submitt their conscience to this new (unbiblical, in the view of the loyalists) form of government. How did this affect the development of American Presbyterianism?
Would it not be similar to how the split into Northern & Southern churches affected many issues?