The Establishment Clause of the First Amendment was not written to preclude the mention of God in the Pledge of Allegiance.
You're aware, I'm sure, that the Framers held that rights were endowed by our Creator?
How can the mention of God, our Creator, violate a right endowed by God, our Creator?
The people who promulgate this kind of BS believe that we are meat byproducts of stochastic processes (the ideological doctrine of evolutionism). You have to assume that colors their "thinking" somewhat...