Read the article. He states that he never accepted what the faith demanded, yet faulted his teachers (sounds like Northeastern feel good university Catholics) for not pointing out forcifully what was demanded.
So, if by his own admission, he never accepted the requirements of Catholicism, how can he talk about returning to Catholicism?
RE: how can he talk about returning to Catholicism?
Was he baptized Catholic? If so, he is talking about returning ( or in his case, not returning ) in THAT sense.