Not true at all... the earliest fabricated narratives about Jesus were Paul's epistles where Paul says Jesus was a god from heaven.
There is no known evidence that the myth/fiction fables called the Pauline Corpus were the earliest narratives of Jesus.
Virtually all elements to show the Pauline Corpus was early are MISSING.
Let me give a partial list.
The Christian Jesus story and cult PREDATE Paul.
1. In the Pauline Corpus Paul persecuted the Faith that he now preached.
2. In the Pauline Corpus Paul claimed he met Apostles Peter and James found ONLY in FICTION fables of Jesus called the Gospels.
3. All FOUR Myth/Fiction fables called Gospels mentioned NOTHING of Paul.
4. Acts of the Apostles mentions Paul over 100 times but did NOT ONCE refer to a Pauline letter.
5. Christian writers Origen and Eusebius claimed Paul knew of gLuke and used it.
6. In the Muratorian Canon it is claimed Paul wrote his Epistles AFTER the Revelation of John.
7. According to Scholars the Pauline Corpus was really a compilation of MULTIPLE writers--NOT a single source.
8. The post-resurrection OVER 500 story in the Pauline Corpus is a very late version which was UNKNOWN to ALL the four Gospel writers.
9. Christian Scriptures of Jesus were ALREADY composed and received by Paul in the Pauline Corpus.
10. Non-Apologetic writers up to c 175-180 CE knew nothing of Paul, the Pauline Gospel and the Pauline post resurrection narrative.
11. Apologetic writers knew nothing of Paul, the Pauline Corpus and the Pauline post resurrection narrative up to the 3rd century.
12. All Apologetic writings mention Jesus or Christ but NOT Paul.
13. Only around the end of 3rd century that most Christian writings mention Paul and Jesus Christ.
14. Only around the end of the 3rd century that non-Apologetics began to mention Paul and Jesus Christ.
There is little or no evidence that the Pauline Corpus predated the fables called Gospels.