Unitarianism is predicated on the belief that there is, at most, one God.
if God is infinite, it seems to me that trying to count "how many" He is, would be doomed to failure.
it's sort of like trying to decide if he is a million miles tall or two million miles tall.
Actually, from what I have seen of the Unitarians and liberals in general is that you can have as many or as few gods AS YOU WISH. They just can't be named Yahweh!