Now when Porcius Festus was sent as successor to Felix by Nero, the principal of the Jewish inhabitants of Cesarea went up to Rome to accuse Felix; and he had certainly been brought to punishment, unless Nero had yielded to the importunate solicitations of his brother Pallas, who was at that time had in the greatest honor by him. Two of the principal Syrians in Cesarea persuaded Burrhus, who was Nero’s tutor, and secretary for his Greek epistles, by giving him a great sum of money, to disannul that equality of the Jewish privileges of citizens which they hitherto enjoyed. So Burrhus, by his solicitations, obtained leave of the emperor that an epistle should be written to that purpose. This epistle became the occasion of the following miseries that befell our nation; for when the Jews of Cesarea were informed of the contents of this epistle to the Syrians, they were more disorderly than before, till a war was kindled.
I just heard a theory that the Greek Epistles are the New Testament letters commissioned by Nero essentially asserting that Nero (or his wife) created Christianity. I'm not asking whether you are a believer or not (of which I certainly do believe in Christ) rather, is this claim tenable or even seriously considered among academics and scholars? What are the greek epistles Josephus mentions?