Jeff you are the one engaging in circular reasoning: A proves B because B proves A is a fallacy argument.
Paul's letters were added to the Roman Catholic Bible a century after Paul had died. Paul was not referring to his own letters as "Scripture".
Even then, Paul was NOT an apostle of Jesus. Paul never met Jesus, never walked with Jesus. Paul taught a Pagan Mithraic gospel about Jesus that was "different" than what the Chiefest Apostles (KJV) preached.
Add to this that GOD PUNISHED Paul by saddling him with an aggelos Satan, and "Angel of Satan", a demon; one that GOD refused to remove.
Jesus propheseided about Paul, but the Church avoids the prophecy because Jesus outs Paul as the Revenous Wolf that he was:
https://keith-michael.medium.com/beware-of-ravenous-wolves-jesus-prophecy-of-paul-40d3bab8a6a2