That was said as a personal opinion, not as a dogmatic ex catedra pronunciation.
Discussion
If he's not Catholic personally he's not the Pope
He can sin and remain Catholic
He cannot reject Catholic dogma personally and remain Catholic
That was said as a personal opinion, not as a dogmatic ex catedra pronunciation.
If he's not Catholic personally he's not the Pope
He can sin and remain Catholic
He cannot reject Catholic dogma personally and remain Catholic