Except that Josephus did not release his first commentary on that part of history until 93/94 CE while it is said the latest Mark was written was 70 CE (it was most likely closer to 40-50 CE...much of the Bible was written prior to 67 CE). Even his commentaries on the Jewish Wars were not until 75 CE.
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, purifies us from all sin.