Five hundred years of estrangement between US and THEM are indicative, each one of them, that the Reformers or "Protestants" were not solely at fault in the great split we call the Reformation, and in many respects were not at fault at all.  On the other side of the split, some Roman Catholics erroneously believe that the Roman Catholic church, then and now, could not possibly at fault!  And that's why the Spirit chose a leader like Jorge Bergoglio, to reacquaint us all with mercy!