This is why it's going to be pretty tough to fit the founding generation into our own political conflicts. Most efforts to do so (while probably well-intentioned) are going to founder (ahem!) on the fact that our political questions and ideologies don't fit theirs very well.
I mean you take the point, but movements we would recognize as radical existed in the 1600s/1700s were known to the Founders: Levellers/Diggers/Fifth Monarchists, etc. The Founders mostly (Paine, a few others excepted) rejected this view. 1/