The Constitutional position is that each American decides for themselves, and Congress stays out of it.
Freedom OF Religion is not Freedom FROM Religion.
It imposes Atheism as the official stance (there is no god that can be spoken of except the No God god).
Clearly the founding fathers did not intend this. They made references to God in the Bill of Rights. Had they wanted “no references whatsoever” to God, they would have written that way.
Time was in Europe the populace had to convert from Catholicism to Protestantism to Catholicism to Protestantism depending on who was in power. In the muslim world, non-muslims pay a tax for following a different faith.
You can practice whatever faith with no penalty in this country. But it doesn’t mean that you can’t mention God in any official capacity if in doing so you are not establishing that faith as the Official State Religion.
The same restriction on advocating a faith also prohibits opposing it. The NEA funded art that is antiChristian is likewise prohibited under the “establishment” clause.