And if the Archbishop believes this he is either a fool or a heretic. Do the Rainbow Sashers accept the call to chastity for those outside of holy matrimony and the sinfulness of all homosexual activity? Do they reject that mortal sins should be confessed and absolved prior to partaking of holy communion? It is quite clear that they do not, or there would be no point to their disruption of religious services and their attempt to deny the freedom to worship peacefully to faithful Catholics.
It would be instructive to see what would happen if a bunch of Opus Dei or Legionaries came to Mass wearing attire that identified them with those groups. Bet there would be a lot of men in the ordained group who would be more uncomfortable with the above than they are with the rainbow sash wearers.