I am not conflating faith with religion, but the statement clearly refers to his religion...MacIntyre appeals and arguments smuggle theology in through the back door.

Presents basic commitments as if they were simply the unavoidable presuppositions of moral reasoning, yet in practice the basic commitments he privileges are those of Roman-Catholic Thomism. By treating them as axiomatic rather than doctrinal...transforms a Catholic moral vision into what looks like a neutral starting point.

Disguises an apologetic project as pure philosophy.

“At the foundation of moral thinking lie beliefs in statements the truth of which no further reason can be given.” ― Alasdair C. MacIntyre, After Virtue