Ask every single one of the clerics in this video if they accept Vatican II and the bastard sacraments. There’s a reason Archbishop Lefebvre stated that an agreement would be impossible, EVEN IF Rome granted unrestricted access to the 1962 books.
Notre Dame was being profaned on a daily basis. If I, as a priest, believed that the New Mass was valid, then there’s no way I could really even set foot in Notre Dame, what with the likelihood of particles being dusted all over the sanctuary, except to rescue these hosts and bring them to a Catholic Church.