> "Origen, St. Augustine, Thomas Aquinas, Kierkegaard, or even contemporary thinkers like Alasdair McIntyre ... should be super easy to refute, right?"
You're shifting the burden of proof; there is nothing to refute. It's not the job of atheists to disprove your assertions. Regardless of a persons' intelligence, they cannot argue their deity into existence. It either exists or it doesn't. None of the aforementioned scholars ever presented evidence for their god or demonstrated supernatural causation.