The earliest writings of Jesus are Paul's and he can't seem to make up his mind if Jesus is a normal man (Romans 1:1-3; Galatians 4:4), a demigod (Romans 8:31-34; Galatians 4:6; 2 Corinthians 1:19) or God himself taking human form to walk among us mortals (Philippians 2:5-11; Romans 14:10 + 2 Corinthians 5:10)
Your statement is a known fallacy and completely un-evidenced. There is no corroborative evidence whatsoever that writings under the name of Paul are the earliest writings of Jesus.
1. No NT author claimed the Pauline letters were composed before the Fall of the Jewish Temple.
2. The Pauline writings admitted there were Scriptures which stated Jesus DIED for the sins of mankind, was BURIED and RESURRECTED on the Third day.
3. Apologetic writers admitted Paul was ALIVE after gLuke was composed.
4. In the Muratorian Canon it is admitted that the Pauline letters were composed After the Apocalypse of John.
5. In writings attributed to Justin Martyr, there is NO mention at all of Paul and the Pauline Corpus but mention of the Apocalypse of John.
6. Not a single reference to Paul and the Pauline Corpus was used in Justin Martyr's conversion to Christianity.
7. In "Apology" attributed Aristides, there is no acknowledgment of Paul and no acknowledgment that he preach the Gospel--it was the 12 disciples.
8. In Minucius Felix Octavius, not a single mention of Paul or the Pauline Corpus was used in the conversion of Caecilius to Christianity.
9. In Arnobius' "Against the Heathen" there is no acknowledgment of Paul and the Pauline Corpus and no claim that Paul preached to the Gospel to the heathen.
10. In Ephraem's "Against Marcion" there is no mention of Paul or the Pauline Corpus.
11. The author of Acts did not corroborate a single Pauline letter.
12. The earliest actual Pauline letters [P 46] that have been found are from the 2nd century or later.
13. Letters in the Pauline Corpus have already been found to be forgeries or falsely attributed.
14. Paul is mentioned in 2 Peter but the Epistle is an admitted forgery by the very Church.
15. Letters between Paul and Seneca to place Paul in the time of Nero has been deduced to be forgeries.
16. Origen in "Against Celsus" admitted that Celsus wrote NOTHING about Paul.
The abundance of evidence against Paul and Pauline writings pre 70 CE is overwhelming.