This is the Mass, yes!-but is it a Mass by a priest who interprets Vatican Council II with an irrational premise or is it one who does not use this false premise of being able to see the dead who are known exceptions to the dogma extra ecclesiam nulla salus.
The FSSP priests will offer this Mass using the false premise in the interpretation of Vatican Council II. The Clouncil will appear as a break with the past.This is heresy. Since they are denying the dogma extra ecclesiam nullas salus, which was ex cathedra and they are denying the dogma on the infallibility of the pope ex cathedra.
They are also saying that Vatican Council II which was a pastoral Council is a dogmatic Council. With the use of the false premise Lumen Gentium 16 becomes visible to us in life and so contradicts the dogma on exclusive salvation in the Church. So the Council rejects a dogma and the traditional teaching on other religions and Christian communities, for those priests who make this error.
Rorate Caeili which posts these reports and pictures does not affirm Vatican Council II without the false premise.