This is a very old accusation. Mystics in the Islamic tradition were accused of pantheism, which Richard Dawkins famously declared to be nothing more than “sexed-up atheism.” Hume depicts the mystical theist Philo as being accused of atheism in his Dialogues Concerning Natural Religion.
It is interesting that, when thinkers increase the degree to which God is thought of as truly ultimate, transcendent, and infinite, and less anthropomorphically, this is viewed not as a more majestic view of God, but as “atheism.”
I think what this shows is that many theists in fact view God as a being who may be more powerful than others, but differs from them in degree rather than kind. And so one could counter this accusation of atheism in kind with an accusation that such theists are both atheists and polytheists. They are atheists inasmuch as they deny that God is the truly ultimate. And they are polytheists inasmuch as they demote God to one being among others.
What do you think? Is emphasizing that the ultimate is beyond human comprehension, and beyond human categories like personhood, an expression of atheism? Or is Tuggy wrong to suggest that there is a non-naturalistic atheism which can be called ultimism, which renders the view of many classic Hindu texts, and of many progressive and liberal Christians and Jews, “atheism”? Is saying that God is not a thing saying that God is nothing, or elevating God above the level of things?