This gives me the opportunity to highlight a doctrinal position taken by the SSPX.
The position, which is summarized below, is one basis for the Southern Poverty Law Center (SPLC) to declare the SSPX a hate group. I have reported on the SPLC several times. No member of the SSPX has been present at a riot against the police ever, but someone from the SPLC - Thomas Jurgens - was, which alone makes ludicrous their accusation against the SSPX - see Crime Blog entry on 3/7/2023.
Integralism, integrationism, or integrism (French: intégrisme) is an interpretation of Catholic social teaching that argues the principle that the Catholic faith should be the basis of public law and public policy within civil society, wherever the preponderance of Catholics within that society makes this possible.
Integralists uphold the 1864 definition of Pope Pius IX in Quanta cura that the religious neutrality of the civil power cannot be embraced as an ideal situation and the doctrine of Leo XIII in Immortale Dei on the religious obligations of states.
For more on Pius IX, see https://www.newadvent.org/cathen/12134b.htm. He was beatified in 2000.
In December 1965, at the very end of Vatican II, Paul VI promulgated the document Dignitatis humanae–the Council’s “Declaration on Religious Freedom”–which states that it “leaves untouched traditional Catholic doctrine on the moral duty of men and societies toward the true religion and toward the one Church of Christ”, simultaneously declaring, “that the human person has a right to religious freedom.”
The latter declaration was the move Archbishop Lefebvre, founder of the SSPX, argued against as at odds with previous doctrinal pronouncements.
Wikipedia makes a serious mistake, stating that the SSPX is not in full communion with the Holy See.
The largest traditional orders in the US (Latin Mass only) are the SSPX, FSSP, and ICKSP. I’m a member of an FSSP church and the FSSP Confraternity, and I don’t pick fights with anyone on the right side of history.
When was the last time the Jesuits built a new church? Was it St. Ignatius, San Francisco, 110 years ago? Oh, I found one, St. Ignatius, Sacramento, built 1954, 69 years ago, replaced 1959, 64 years ago.