From
https://carm.org/regarding-quotes-historian-josephus-about-jesus (A Christian website):
The problem with the copies of
Antiquities is that they appear to have been rewritten in favor of Jesus and some say too favorable to have been written by a Jew. Add to this that the Christians were the ones who kept and made the copies of the Josephus documents throughout history and you have a shadow of doubt cast upon the quotes.
However, all is not lost. First of all, there is no proof that such insertions into the text were ever made. They may be authentic. The "Testimonium" is found in every copy of Josephus in existence. Second, Josephus mentions many other biblically-relevant occurrences that are not in dispute (see outline below). This adds validity to the claim that Josephus knew about Jesus and wrote about Him since he also wrote about other New Testament things. Nevertheless, though there may be some Christian insertions into the text, we can still reconstruct what may have been the original writing.
Two researchers (Edwin Yamauchi and John P. Meier)
1 have constructed a copy of the "Testimonium" with the probable insertions in brackets and underlined. The following paragraph is Yamauchi's:
“About this time there lived Jesus, a wise man [if indeed one ought to call him a man.] For he was one who wrought surprising feats and was a teacher of such people as accept the truth gladly. He won over many Jews and many of the Greeks. [He was the Christ.] When Pilate, upon hearing him accused by men of the highest standing amongst us, had condemned him to be crucified, those who had in the first place come to love him did not give up their affection for him. [On the third day he appeared to them restored to life, for the prophets of God had prophesied these and countless other marvelous things about him.] And the tribe of the Christians, so called after him, has still to this day not disappeared.”
Though this may be a correct assessment of the "Testimonium," we should note that an Arabic version (10th Century) of the "Testimonium" (translated into English) is in basic agreement with the existing Josephus account:
"At this time there was a wise man who was called Jesus. And his conduct was good, and he was known to be virtuous. And many people from among the Jews and the other nations became his disciples. Pilate condemned him to be crucified and to die. And those who had become his disciples did not abandon his discipleship. They reported that he had appeared to them after his crucifixion and that he was alive; accordingly, he was perhaps the Messiah concerning whom the prophets have recounted wonders."
2
Notice that the line about the resurrection was probably inserted later in the Josephus version, and in the Arabic version it says: "They reported that he had appeared to them after his crucifixion and that he was alive; accordingly, he was perhaps the Messiah concerning whom the prophets have recounted wonders." "They reported", thus this is evidence that his disciples believed in the resurrection, not that the writer believes it.