The publication of diaries belonging to Angelo Roncalli (the future Pope John XXIII) have rekindled controversy about Pope Pius XII and the Holocaust, furnishing proof that he had opposed the return of Jewish children who’d been protected in Catholic convents to their parents after the Nazi’s defeat. According to the diaries, Pius XII attempted to block the efforts of Roncalli to reunite the Jewish families, saying that children who had been baptized as Christians while in hiding should not be returned unless they could be guarunteed a Christian upbringing.