just as also our beloved brother Paul, according to the wisdom given him, wrote to you, as also in all his letters, speaking in them of these things, in which are some things hard to understand, which the untaught and unstable distort, as they do also the rest of the Scriptures, to their own destruction. (2 Peter 2:15,16)
He don`t, he said Paul`s letters.
as they do the other Scriptures, to their own destruction
Peter had been talking about scripture from the old testament so it is doubtful to me if he was calling Paul`s letters scripture.
Peter said, "as they do the other Scriptures", that phrase means he was calling Paul's writings Scripture, too. Peter was talking about ALL Scripture - including what was STILL ongoing revelation. Are you contending that the Apostles Peter, John, Paul, James and Jude were NOT writing Holy Spirit-inspired Scripture which was received as from God by the first Christians?