Two recent quotes from the Holy Father:
"Criticism helps me to walk on the righteous path of the Lord".
"If you must argue, argue. If you have something to say, say it. But do it like men, face to face, and as men of God who then go together to pray and try to differ together. And if you have crossed boundaries, then ask forgiveness".
Peremptory answers to those who say that criticism of the Roman Pontiff and of the Hierarchy should be done quietly by friends over an intimate drink, behind their backs, and not in a public forum!