So Anyway, The Author of 'The Exorcist' Was Totally for Real

It's not what this article is about.    But still, the inference here is that William Blatty honestly believes that heroic priests sacrificing themselves to defeat supernatural pagan-devils that actually exist in our own objective reality is a thing that actually has happened\is happening in our own physical universe.  This is what a man smart enough to graduate from a prestigious East Coast university and write a best selling novel actually believes.   Yup.