Please humby read what the Church says and know, as St. Augustine said, "The Church has spoken the debate is ended."
DECREE OF EXCOMMUNICATION
From the Office of the Congregation for Bishops, 1 July 1988.
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Monsignor Marcel Lefebvre, Archbishop-Bishop Emeritus of Tulle, notwithstanding the formal canonical warning of 17 June last and the repeated appeals to desist from his intention, has performed a schismatical act by the episcopal consecration of four priests, without pontifical mandate and contrary to the will of the Supreme Pontiff, and has therefore incurred the penalty envisaged by Canon 1364, paragraph 1, and canon 1382 of the Code of Canon Law.
Having taken account of all the juridical effects, I declare that the above-mentioned Monsignor Marcel Lefebvre, and Bernard Pellay, Bernard Tissier de Mallerais, Richard Williamson and Alfonso de Galarreta have incurred <ipso facto> excommunication <latae sententiae> reserved to the Apostolic See.
Moreover, I declare that Monsignor Antonio de Castro Mayer, Bishop emeritus of Campos, since he took part directly in the liturgical celebration as co-consecrator and adhered publicly to the schismatical act, has incurred excommunication <latae sententiae> as envisaged by canon 1364, paragraph 1.
The priests and faithful are warned not to support the schism of Monsignor Lefebvre, otherwise they shall incur <ipso facto> the very grave penalty of excommunication.
From the Office of the Congregation for Bishops, 1 July 1988.
Bernardinus Card. Gantin Prefect of the Congregation for Bishops
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Here is the text of a letter from the Congregation on the Doctrine of the Faith answering the question of the status of the SSPX:
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a. The Pope is the supreme legislator in the Church. In an Apostolic Letter which he issued motu proprio (on his own initiative) he declared that
Mons. Lefebvre and the priests Bernard Fellay, Bernard Tissier de Mallerais, Richard Williamson and Alfonso de Galarreta, have incurred the grave penalty of excommunication envisaged by ecclesiastical law. (Cf. Code of Canon Law, can. 1382).
Those mentioned above who are still living and have not asked pardon from the Church for the ill which they have caused are still under the censure of excommunication.
b. While the priests of the Society of St. Pius X are validly ordained, they are also suspended a divinis, that is they are forbidden by the Church from celebrating the Mass and the sacraments because of their illicit (or illegal) ordination to the diaconate and the priesthood without proper incardination (cf. canon 265). In the strict sense there are no "lay members" of the Society of St. Pius X, only those who frequent their Masses and receive the sacraments from them.
While it is true that participation in the Mass at the chapels of the Society of St. Pius X does not of itself constitute "formal adherence to the schism", such adherence can come about over a period of time as one slowly imbibes a schismatic mentality which separates itself from the teaching of the Supreme Pontiff and the entire Catholic Church classically exemplified in A Rome and Econe Handbook which states in response to question 14 that the SSPX defends the traditional catechisms and therefore the Old Mass, and so attacks the Novus Ordo, the Second Vatican Council and the New Catechism, all of which more or less undermine our unchangeable Catholic faith.
It is precisely because of this schismatic mentality that this Pontifical Commission has consistently discouraged the faithful from attending Masses celebrated under the aegis of the Society of St. Pius X.
b. Thus far the Church has not officially declared what Constitutes "formal adherence to the schism" inaugurated by the late Archbishop Lefebvre (cf. Ecclesia Dei 5, c), but the Code of Canon Law defines schism as "refusal of submission to the Roman Pontiff or of communion with the members of the Church subject to him" (canon 751). The above citation together with the other documentation which you have included in your dossier and your own exchange of correspondence with Father Violette clearly indicate the extent to which many in authority in the Society of St. Pius X corroborate that definition.
c. It may still be difficult to characterize the entire Society of St. Pius X, but the documentation which you have submitted witnesses to a consistent condemnation of the new Mass, the Pope and anyone who disagrees with the authorities of the Society in the smallest degree. Such behaviour is not consistent with the practice of the Catholic faith.
Msgr Camille Perl
There is also the document, Ecclesia Dei:
NOTE: Individuals who attend SSPX masses are not necessarily in schism, but could be, it depends, though they are arrogantly and immaturely rebellious of the Church's admonition against attending the illicit SSPX masses.
The Bishops of the SSPX, however, are in schism.
As mentioned, "the Church has spoken, the debate is ended."
At such time, if and when, the SSPX is fully reconciled with Rome, I and many people will rejoice.
God Bless,
Bro Ignatius Mary