Those who reject the Athanasius Creed stand condemned. This would include Pope Benedict, Cardinal Muller,Cardinal Ladaria, the Archbishop-Secretaries of the CDF...

  Pope Paul VI clarified in 1966 that, "In view of the pastoral nature of the Council, it avoided proclaiming in an extraordinary manner any dogma carrying the mark of infallibility. 1

Lionel: Pope Paul VI interpreted Vatican Council II with a false premise instead of without it. He accepted the factual and objective error in the Letter of the Holy Office to the Archbishop of Boston (1949) which rejected the dogma extra ecclesiam nulla salus.

The same in its own degree must be asserted of the Church, in as far as she is the general help to salvation. Therefore, that one may obtain eternal salvation, it is not always required that he be incorporated into the Church actually as a member, but it is necessary that at least he be united to her by desire and longing.-Letter of the Holy Office 1949

'Therefore, that one may obtain eternal salvation, it is not always required that he be incorporated into the Church actually as a member'. Why ? Since there are objective exceptions of being saved with the baptism of desire? 

...each and everything set forth definitively by the Magisterium of the Church regarding teaching on faith and morals must be firmly accepted and held; namely, those things required for the holy keeping and faithful exposition of the deposit of faith; therefore, anyone who rejects propositions which are to be held definitively sets himself against the teaching of the Catholic Church.

Lionel: So the Congregation for the Doctrine of the Faith (CDF) expects every one to accept that the baptism of desire(BOD) and being saved in invincible ignorance(I.I) are objective exceptions to the traditional interpretation of the dogma extra ecclesiam nulla salus(EENS).

Those who do not use the false premise un-like the popes and the CDF,  will ' set himself against the teaching of the Catholic Church'. 

Anyway the popes and the CDF have set themself against the popes over the centuries, who accepted hypothetical BOD and I.I but did not project them as objective exceptions to the Athanasius Creed, the Syllabus of Errors and Jesuit EENS.There was no rupture with Tradition.

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So, Mr Weigel is not teaching heresy, only error. In its Doctrinal Commentary on the 1998 Apostolic Letter (Motu Proprio) Ad Tuendam Fidem the CDF tells us "Whoever denies these truths would be in a position of rejecting a truth of Catholic doctrine and would therefore no longer be in full communion with the Catholic Church."

Lionel: So those who do not misinterpret BOD and I.I and create exceptions for the Nicene Creed, Apostolic Creed and Athanasius Creed  would not be in full communion with the Church.One has to be in heresy to be in full communion with the present Church ecclesiastics, according to Cardinal Ratzinger.

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The Code of Canon Law (1983) goes on to say,

Canon 1371 – The following are to be punished with a just penalty:

1° a person who, apart from the case mentioned in canon 1364 § 1, teaches a doctrine condemned by the Roman Pontiff, or by an Ecumenical Council, or obstinately rejects the teachings mentioned in canon 750 § 2 or in canon 752 and, when warned by the Apostolic See or by the Ordinary, does not retract.

Lionel: Those who reject the Athanasius Creed stand condemned according to Canon Law.

This would include Pope Benedict, Cardinal Muller,Cardinal Ladaria, the Archbishop-Secretaries of the CDF...-Lionel Andrades

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