There is only one God.
I'll ask the question again, because it's an easy one, IMO, and very specific.
Do you believe in the God of the Old and New Testaments?
Lots of people can mouth the words "There is only one God." But that singular diety can take the form of Zoroaster's "Ahura Mazda," or the Great Polar Bear in the Sky, or a tree, or some esoteric, amorphous "Oneness"...
On the FR Religion Forum, it's not too invasive a question to ask a posting member: Do you believe in the God of the Old and New Testaments?