If the SSPX uses the left hand side (blue) column in the interpretation of Vatican Council II then Vatican Council does not contradict the Syllabus of Errors, the dogma extra ecclesiam nulla salus and the Catechism of Pope Pius X. So the traditional teaching is affimed on other religions, ecumenism and religious liberty when the rational column is used in the interpretation.
Check it out for yourself.
Here is the format.
All salvation referred to in Vatican Council II i.e saved in invincible ignorance (LG 16), imperfect communion with the Church (UR 3).seeds of the Word (AG 11), good and holy things in other religions or ' a ray of the Truth' (NA 2) are either:
LEFT HAND COLUMN................................. RIGHT HAND COLUMN
implicit or explicit for us.
hypothetical or known in reality.
invisible or visible in the flesh.
dejure ( in principle) or defacto ( in fact ).
subjective or objective.
The left hand column does not contradict extra ecclesiam nulla salus. So Vatican Council II is in agreement with the traditional teaching on Islam and the other religions.
With the left hand side column 'imperfect communion with the Church'(UR 3) among Protestants is not a known exception to the dogma extra ecclesiam nulla salus.
Since there is no contradiction or exception to extra ecclesiam nulla salus, or need to enter the Catholiic Church with no known exceptions in 2014-2015. So there is no exception to the teaching on the Social Reign of Christ the King over all political laws.There is no known salvation outside the Church.
Since there is no salvation outside the Church all political laws must have Jesus as its center as taught by the Catholic Church.
So the SSPX has only to interpret Vatican Council II with the left hand side column and Vatican Council II is no more a break with their traditional beliefs on other religions, traditional ecumenism and religious liberty.