Our understanding of God is very different now than it was 200 years ago. My Orthodox View of God is very different then say the Lutheran or Anglican view of God let alone the Buddhist or Zoroastrian God. So can we say we are under God? This is one of the reasons I get nervous when people start saying we need to start returning to our countries Christian roots! We are not the same country we were 200 years ago, we have evolved and become very diverse.
I would have to say yes we can. You might ask why I come to this conclusion and I would simply say that our diversity is our greatest strength. The fact that we are the most religiously diverse nation is exactly what makes us able to say we are under God, mainly because we can say that! Imagine, we have a law that says we are under God! What other nation on earth can say that? We do not judge, or at least we should not, judge another for their beliefs or lack of belief. We have freedom to express our vision and understanding of God as we see fit, that is what makes us One Nation Under God!
In 1782 by an act of Congress the phrase “E Pluribus Unam” was added to the Great Seal of the United States. “Out of many, one” has been the motto of the United States ever since. The philosophy comes from a poem attributed to Virgil and describes the blending of colors into another color. Another way of thinking about it is to say out of our diversity comes our unity. (E Pluribus Unam is the motto of the Great Seal, by act of the 84th Congress “In God We Trust” was adopted as the official motto of the United States of America.)
As long as we have been a nation we have called upon a deity for prayer and protection. It is printed on our money, over the objections of President Theodore Roosevelt because he thought it was sacrilegious to put God’s name on money, and it is in the Pledge of Allegiance. The writings of the founders echo with themes of God and God was invoked at the founding of this great nation.
I would say we are indeed Under God, the god of your choosing, and that is what makes this country great!