You don't even understand the establishment clause.
Certainly you did. Concurrent with the drafting and ratification of the COnstitution several of the states did indeed have state religions. The states wanted protection from a national religion, a la King George and his merry men, and thus the establishment clause.
That's a fact Doc. Deal with it.
It is the religious right that misrepresents it, acting as though the flagrant use of "God" is within Constitutionality because it doesn't endorse "a" religion, since as they say "God" is represented in several religions.
Religious right, left or atheist, the voluntary use of the word God is a self evident right I would think. What philosophy is it that you adhere to than bans free speech in the public square?
What they manage to obscure though, of course, is that "God" is exclusively the deity of what can only be described as the greater Abrahamic religion.
So what?