I agree that there is a lot of misunderstanding of how the founders felt about such issues, but most of it is on the side of the "separation of church and state" dogmatists. The founders opposed the establishment of a state religion, but did not oppose encouragement of religion. In fact, the Northwest Ordinance of 1787 (passed by the same Congress that approved the Constitution) includes language saying "Religion, morality and knowledge, being necessary to good government and the happiness of mankind, schools and the means of education shall forever be encouraged". It was no accident that they connected religion and morality with education. We clearly don't understand the founders' view.