Maybe you can get it through to his thick skull.
As I said in this thread, there are Sedes who have taken his position regarding indefectibility, who are consistent, and have made a viable case regarding Sedevacantism. For example, in terms of those whose opinion I respect and who are worthy of much consideration, John Daly, John Lane, Bishop Sanborn, Father Cekada . . . those are the ones that jump out to me at the moment.
His position is totally inconsistent, and one cannot regard him seriously. He hurts the Sede position with his contradictions.
Yes, I'm still very new to this but John Daly is amazing, did you read his Theological status of Heliocentricity? Excellent study! Cekada of course is great, the best I've read from him is Absolutely Null and Utterly Void.
Speaking of Daly, do you know where I can find his Catechism on the choice of state of life? It was mentioned in his marvelous talk on sedevacantism (Very much recommended: read
here, or listen
here) and I can't seem to find it.
Yes, it hurts the position but it hurts him much more.
Ladislaus, I started listening to the TradCast podcast recently and found
episode 4 to be the most convincing explanation of Church doctrine on salvation I've heard so far. If you haven't heard it already I'd like to recommend it.