[Slugworth]

Many, if not most of its members, are sede vacantists who deny the validity of Novus Ordo, the revised Rite of Ordination, and the present pope,"

False. The official SSPX positions on these matters is well within the reach of anyone with an internet connection & half a brain, and I don't recall answering an Archdiocesan-sponsored poll.

[Petrosius]

You will notice that the notice spoke of the members of St. Anthony's, not the priest or SSPX. Is this questioning of the validity of the Novus Order and revised Rite of Ordination truly absent from St. Anthony's? What was the need to separate from the original chapel in West Orange?