Fr. Cekada, God rest his soul, wasn't a dogmatic sedevacantist. The Dimonds are dogmatic sedevacantists, believing sedevacantism is dogma. I've spoken to Fr. Cekada on Suscipe Domine, where Father used to post, and elsewhere. I don't agree with him on everything, and pointed out UEA and other things to Father when dialoging with him - which was a pleasant conversation both ways - but Father is right here about Catholic Theologians. Pope Bl. Pius IX's words on the subject, the same Pope who defined PI and OUM, prove as much.