Ditto, ditto, ditto...it's so good I'm repeating it.
The statement that this is a nation "under God" is less a statement of faith than it is a statement of historical fact. The foundational principle of the nation – and it may be a unique foundational principle among nations – is the supposition that "all men are CREATED equal," and are "endowed by their CREATOR with certain inalienable rights" – rights not created or granted by the state, but rights bestowed upon man by God. Since they are bestowed by God, these rights that are absolute; they are not based on the subjective or capricious whim human rulers. This is a critically important distinction. Eliminate this concept of God-given rights from the basis of our society’s political values and what we have to revert to are rights and liberties that are derived from the power of the state – and the state will always have the power to take those rights away. God-given inalienable rights cannot be taken away; and where they are denied by the state, the state has lost its legitimacy to exist (so says our Declaration of Independence).
The founders clearly acknowledged that this was a nation founded "under God" or Providence. Many people today may not acknowledge God, but this dependence and acknowledgement of God is an important part of our national heritage. The atheists may not like it, but this is historical fact, and as Americans who love their country, they should be willing to acknowledge that historical fact.