NIV 2 Peter 3:16
He writes the same way in all his letters, speaking in them of these matters.
His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.
He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand,
But then he added
which ignorant and unstable people wrest, as they do the other Scriptures, to their own destruction.
As also in all his epistles, speaking in them of these things;
The above is what Peter was agreeing with Paul on, that does not mean that Peter agreed with him on everything, he just knew when to keep quiet.
What was Peter,s intent on saying what he did?
Peter was told to turn the other cheek if a brother slapped him, but obviously Paul was told no such thing.
Peter did not want to go into a verbal war with Paul because Paul was an educated man, Peter would have been destroyed, Paul did enough damage to him and the other apostles as it was.
I've seen this attempted here...