You really can't use Paul or the writings ascribed to his for any kind of historical evidence. There is no record of his death and NO information on his life. Paul's own account of his life is found in Galatians--his epistles are found in the "book of Acts," Biblical scholars say that information is "acts" directly contradicts his accounts in Galatians. There are no autographed copies of his writings and NO original manuscripts.<quoted text> Paul predates the Gospels. Back to Ehrman.
With respect to Jesus, we have numerous, independent accounts of his life in the sources lying behind the Gospels (and the writings of Paul)-- sources that originated in Jesus' native tongue Aramaic and that can be dated to within just a year or two of his life (before the religion moved to convert pagans in droves). Historical sources like that are is pretty astounding for an ancient figure of any kind. Moreover, we have relatively extensive writings from one first-century author, Paul, who acquired his information within a couple of years of Jesus' life and who actually knew, first hand, Jesus' closest disciple Peter and his own brother James. If Jesus did not exist, you would think his brother would know it.
Secular sources not likely to use the Gospels
CORNELIUS TACITUS (55 - 120 A.D.) Tacitus was a 1st and 2nd century Roman historian who lived through the reigns of over half a dozen
Roman emperors. Considered one of the greatest historians of ancient Rome, Tacitus verifies the Biblical account of Jesus' execution at the
hands of Pontius Pilate who governed Judea from 26-36 A.D. during the reign of Tiberius.
"Christus, the founder of the [Christian] name, was put to death by Pontius Pilate, procurator of Judea in the reign of Tiberius. But the
pernicious superstition, repressed for a time, broke out again, not only through Judea, where the mischief originated, by through the city of
Rome also." Annals XV, 44...
Skeptic Interjection: Could Tacitus have taken his information from Christian sources?
Answer: Because of his position as a professional historian and not as a commentator, it is more likely Tacitus referenced government
records over Christian testimony. It is also possible Tacitus received some of his information from his friend and fellow secular historian, Pliny
the Younger. Yet, even if Tacitus referenced some of Pliny's sources, it would be out of his character to have done so without critical
investigation. An example of Tacitus criticising testimony given to him even from his dear friend Pliny is found here: Annals XV, 55. Tacitus
distinguishes between confirmed and hearsay accounts almost 70 times in his History. If he felt this account of Jesus was only a rumor or
folklore, he would have issued his usual disclaimer that this account was unverified.
<quoted text> The Gospels can be used to establish existence.
The evidence for most of the history connected to the bible and Christianity just keeps unravelling. There are many biblical scholars who would discount the Gospels as any kind of evidence, I have already posted some of those, in addition, Most biblical scholars say that the Pentateuch was really written almost 1,000 years after the time attributed to Moses's time. On this view Moses did not write any part of the bible. Evidence indicated it was written by Levite priesthood who wrote the Levitical laws in the bible.