Come on, man, how many times have we discussed this?
The first time, 3 or so years ago, you even posted the names of two states that did after looking it up. This revisionist nonsense from the mid 20th Century is exactly that. Public schools used to start the day with prayer, and Congress still does.
Again, the intent was to protect STATE rights with religion from CONGRESS imposing the will of the federal gov't upon them. Even the most atheistic among the Founders saw the value of religion as a cultural institution,, tradition a unifier, an inspiration, a foundation to a common morality.