I’ve read it.
Is it your assertion that Catholics ARE NOT believers belonging to Jesus Christ? A simple yes or no will do.
Do you still beat your wife? A simple yes or no will do.
What I “asserted” was that the Vatican organization was a monstrosity (along with a number of other things). It attempts to hold people captive to its demonic form of homemade religion, tradition, and ceremony.
So, if your question is, “Could individual people who are members of the RCC be rescued by Jesus Christ in spite of their membership with the RCC?” The simple answer is, of course, “yes”. It would not be because of their membership in the corrupt mothership Vatican City, however. The doctrine taught there is nearly opposite that of the biblical Gospel. Thus, the salvation of an individual who fell into Rome’s clutches could still occur. It would be in spite of the RCC, not because of it.
No one can stop the rescue efforts of the God of Heaven, the Holy One of Israel. Not Paul, not the RCC, not you, and not me.