Old time (Trent) Catholics said if you weren't Catholic, you weren't Christian, no salvation, which made one wonder why there were the two terms. Not that it matters what the Catholics say today, but we do know if you were a Muslim, you step to the head of the non-Catholic line. Catholics proclaim more dogma than any. The 'bull', no pun intended in this posting is a Catholic claim about the Reformation, a strange place to find an impartial understanding of the Reformation if that is one's intent.
What Luther and Calvin thought and taught is not a dogma of the Catholic Church.
Nor should it have been, they weren't Catholics anymore. Which is why it is amusing to think the truth about reformation teaching would be found in a Catholic publication.
Evidently RC "doctrine" of "divine wisdom" does not need to recognize the Scriptural basis of the remarks Calvin noted. Ephesians 1, Rom. 9, Acts 13, and dozens of other passages just do not impact the Organization's homemade religion.