I'm content to leave it there for now. I thought the idea might be worth exploring a little and the discussion seems to have unearthed some ambiguities, and possibly the atheism idea is outright contradicted by the existence of Pureland. Might be interesting to ask a Purelander if he sees himself as a theist though.
No catty, as one myself, I don't and here's why... at the heart of Pure Land practice is buddhanusmrti/buddhanusati, mindfulness/contemplation of the Buddha...
Bhikkhus, if you develop and make much this one thing, it invariably leads to weariness, cessation, appeasement, realization and extinction.
What is it? It is recollecting the Enlightened One.
If this single thing is recollected and made much, it invariably leads to weariness, cessation, appeasement, realization and extinction.
Anguttara-Nikaya: Ekanipata: Ekadhammapali: Pañhamavagga
The Buddha said to Ananda and Vaidehi, "After you have seen this, next visualize the Buddha. Why the Buddha?
Because Buddhas, Tathagatas, have cosmic bodies (dharmadhatu-kaya in another translation), and so enter into the meditating mind of each sentient being.
For this reason, when you contemplate a Buddha, that mind itself takes the form of his thirty-two physical characteristics and eighty secondary marks.
Your mind produces the Buddha's image, and is itself the Buddha.
The ocean of perfectly and universally enlightened Buddhas thus arises in the meditating mind.
For this reason, you should single-mindedly concentrate and deeply contemplate the Buddha, Tathagata, Arhat and Perfectly Enlightened One.
The Sutra on Contemplation of Amitayus