Does he not know the phrase "separate art from artist"?
If you read the article, he clearly does. What he's saying is more nuanced than either the Catholic Twitter set or avowed anti-Catholics are acting like it is.
Davidson's take is actually remarkably mature and a breath of fresh air compared to the recent trend of memory holing the career of any talented person who did something despicable. With that said, it only deals with religion in the most tangential sense, and realistically he probably brought up the Catholic Church as a stunt to get people talking about this.