If their conclusion is true --that the founders wanted the same interp of separation as do Christians United for Separation of Church and State and the People for the American Way--then why did they allow Sunday blue laws? Why did they start public ed for the purpose of equalizing all children's reading ability so they could ALL have access to the Bible and not be misled from truth or tyrannized by a state-church? (That was a stated purpose.) Why did they do Christmas pageants, etc. in the public schools? and learn carols? Why do so many of our oldest public buildings and state constitutions acknowledge a Supreme Being? Why did Ben Franklin advocate for chaplains at the Constitutional Convention in 1787? Why does Thomas jefferson refer to a Creator bestowing us all with inalienable rights? Why do so many of G. Washington's speeches have allusions to God and faith? Why his first Thanksgiving proclamation?
Our founders didn't want a state-church or a church-state --but they were God-believers -- or at least God-respectors --and Bible respectors. The first school board of D.C. with Jefferson on it, listed as texts the Isaac Watts Hymnal, the Common Book of Prayer and the Bible.
The Northwest Ordinance included provision for the founding of public schools --so kids could be taught the Bible and religion --among other things.
Today's church-state separators have an entirely different idea. They want "the naked public square." They want NO one to be able to hear the Gospel of Jesus Christ except they seek it out in a church. They have removed the Christmas creche from the courthouse lawn; next, they will work to get it off of private lawns and church lawns--because it won't be politically correct --or allowable --to promote your religion except in the church building--and later, maybe not even there.
"God is not willing that any should perish, but that all should come to repentance and have eternal life."--the Bible