Well, I imagine they aren't fans of Francis either, and the Gospel of John does say "many antichrists have come", so it's entirely possible Pope Francis is also the antichrist.
That said: while he was conservative in many ways, Pope John Paul II was well-known for his ecumenicism, especially mending relations with Jews and Muslims, which might ruffle the feathers of the sort of sedevacantist whose problem with post-Vatican-2 Catholicism is that they got rid of the antisemitism.
That said: while he was conservative in many ways, Pope John Paul II was well-known for his ecumenicism, especially mending relations with Jews and Muslims, which might ruffle the feathers of the sort of sedevacantist whose problem with post-Vatican-2 Catholicism is that they got rid of the antisemitism.