This is nonsense: Jesus' first disciples were simpleminded people who had never heard of this Greek tragedy and it's obvious these events took place, we simply don't know the scientific explanation for that. Jesus himself was doubtlessly a historical figure. As to Paul/Saul, it has been hypothesized that he had a bout of temporal lobe epilepsy when travelling to Damascus. This event took place later and is even better attested.
It's irrelevant whether Jesus was historical or not, it's obvious the Gospel is highly mythologized and takes literary license for eschatological and mystical purposes. There's no doubt in my mind, for instance, that there was no Judas who betrayed Jesus, because his story and name is a reference to the Old Testament and references the Church's relationship to the Jews. The Greek word for "Judah" is "Judas", and Judah / Judas, Joseph's oldest brother from Genesis ( the Joseph with the technicolored dreamcoat) sells Joseph for 20 pieces of silver into Egyptian slavery. The tribe of Judah, of Judas, which comes from this same figure, is the tribe of the Jews and is synonymous with the Southern Kingdom of Judah. There is an intentional spiritual meaning of the Jews repeating Judah's crime of selling Isaac's favorite son for silver.
The New Testament is layered with stuff like this that makes it hard to believe it's purely a historical account and not some parable based mystical story tradition.
It's also suspicious that Paul only mentions the Gospel events once, Paul doesn't even mention the Road to Emmaus story, he claims Jesus gave him revelations directly. And the one mention of Paul of the Gospel events, the Last Supper, we know is a later Christian interpolation because the Marcion Bible version, the oldest New Testament canon we have, mysteriously lacks that reference. It's similarly suspicious that the Apocalypse of John is absent of Gospel imagery, save for the reference to the Crucifixion.
At any rate, simpleminded people who nonetheless composed the Gospels in Greek? And despite the piety signaling, contemporary sources paint a more gray picture assuming these events were even real: the Protoevangelium of James describes the Virgin Mary coming from a wealthy family, and many Marian oral traditions, including her studying at the Temple and being a Temple Virgin until the age of maturation where she got hitched to Joseph, comes from that Protoevangelium.
By the way, the way Greek was taught in the Ancient World was by reading Homer and the Classic Playwrights. Euripedes was one of those writers, It's not at all implausible that Greek speaking Jews would know these stories. Early Synagogues in Israel and Christian catacombs are filled with Greek mythological references, most noteably Orpheus, whom many Christians and Jews confused with Museus of Athens, the teacher of Orpheus.
