I wouldn't be so harsh in condemning Cardinal DiNardo's response, which was wisely non-polarizing.  Father Weinandy's letter is effectively causes further tensions by realizing such a personalized criticism of the Holy Father, and therefore  call for a wise response.  (I find it curious that the man who was supposed to be  the great  theological expert writes a letter so devoid of theology and so concentrated on "the manner." I believe that the anti-Amoris Laetitia crowd are slowly realizing that they do not really have a good theological argument and are proceding to simply to repeat themselves, to listen to their own echoes, and to insist on postulates which are slowly being discredited, while complaining about things not going their way.)  I personally like the argument that when dealing with the Holy Father one should show the decency that one owes to every single brother in Christ. This makes it clear that we are not engaging in sycophancy.