In the entire first Christian century Jesus is not mentioned by a single Greek or Roman historian,

It is false that Jesus was not mentioned by any first-century (or early second-century) historians, though it is true that he was not mentioned during his lifetime. While contemporary Roman records are absent, non-Christian writers—notably Josephus (c. 93–94 AD) and Tacitus (c. 116 AD)—did mention him shortly after, confirming his existence as a historical figure executed by Pontius Pilate.

Josephus (Jewish Historian): In his Antiquities of the Jews (c. 93–94 AD), he refers to Jesus twice. One mention, regarding the execution of James, the brother of "Jesus, who was called Christ," is widely considered authentic by scholars. The second, the Testimonium Flavianum, likely contained later Christian additions, but many scholars believe it has an authentic, core reference to Jesus.
Tacitus (Roman Historian): In his Annals (c. 116 AD), Tacitus mentions that Christians were named after their founder, "Christus," who was executed by Pontius Pilate during the reign of Tiberius.
Other References: Suetonius also mentions early Christians around the time of Emperor Claudius (41–54 AD).

Why No Immediate Records: Jesus was an itinerant preacher in a remote, minor Roman province, and his impact was initially too small to be recorded by Roman officials or elite historians during his lifetime.

While some skeptics have argued for a lack of contemporary evidence, the vast majority of historians conclude that the mentions by early, non-Christian sources, combined with the Pauline letters and Gospels, affirm the historical existence of Jesus