Question: What group did Montini oppose reforming?
Sentence: Montini and Angelo Roncalli were considered to be friends, but when Roncalli, as Pope John XXIII announced a new Ecumenical Council, Cardinal Montini reacted with disbelief and said to Giulio Bevilacqua: "This old boy does not know what a hornets nest he is stirring up."
Answer in sentence: yes