The whole concept of "resistance" is vague anyway. There were priests who never said the New Mass and were "resisting" as early as 1969/70. In their newsletters that would constantly speak of "resisting" the modernist changes and modernist popes. How many traditional Catholics even approach these heretic NO bishops and say, "excuse me your excellency, may I attend the Latin Mass at my local church?" The majority of traditional Catholics "resist" in theory and practice, whether they admit it or not.
The Sede position is more a distraction than anything. Any Catholic with half a head on his shoulders knows that practically all of these NO bishops are heretics, and all of them have questionable orders. There might be a couple of old-timers left, but they are dying off quickly.