One of the top New Testament scholars of recent years has been the late Raymond Brown. I like what Brown says about Josephus’ witness of Jesus in his Death of the Messiah vol. 1 on page 374.
Even if few scholars today would argue that Josephus wrote the whole passage as quoted, most would contend that Josephus wrote a basic text to which Christians made additions. In vocabulary and style large parts of it are plausibly from the hand of Josephus; and the context in which the passage appears in Ant. (i.e., among the early unpleasant relations involving the Jewish leaders and Pilate) is appropriate.