Using John Adams to support putting the Ten Commandments on public property is another howler, Dave.

John Adams was a Deist.

The primary tenet of Deism was a rejection of "revealed religion," faith based on the pronounced revelations of God to followers.

The Ten Commandments is a specific example of revelation, hence the very thing Adams and his fellow Deists REJECTED about Christianity!

John Adams was also a staunch supporter of religious freedom and of separation of church and state. His specific position was:

"Nothing is more dreaded than the national government meddling
with religion."

Like many other Founders, Adams goes much further in his private letters. Despite public statements on the value of religion and morality, many of the Founders (including Adams and Jefferson) were not Christians. John Adams writes to fellow Deist Thomas Jefferson:

"I almost shudder at the thought of alluding to the most fatal example of the abuses of grief which the history of mankind has preserved--the Cross. Consider what calamities that engine of grief has produced!"

Jefferson's unorthodox views on religion, as well as his distaste for Christianity, were well-known even in his own day, and he was often scorned by clergy as an "atheist". In his private letters, he writes to Dr. Woods:

"I have recently been examining all the known superstitions of the world, and do not find in our particular superstition (Christianity) one redeeming feature. They are all alike founded on fables and mythology."

The positions of the "Founding Fathers" are pretty clear, and only by distorting their words or taking things out of context can anyone make it appear as though they ever would have supported such displays.