Actually, the latest scholarship on Josephu's description in his Antiquities(Book 18) indicates some parts of the disputed Testimonium Flavianum(TF) to be accurate and written by our historian Josephus ben Matthias. Here's the original paragraph:
Now there was about this time Jesus, a wise man, if it be lawful to call him a man, for he was a doer of wonderful works, a teacher of such men as receive the truth with pleasure. He drew over to him both many of the Jews, and many of the Gentiles. He was the Christ, and when Pilate, at the suggestion of the principal men among us, had condemned him to the cross, those that loved him at the first did not forsake him; for he appeared to them alive again the third day; as the divine prophets had foretold these and ten thousand other wonderful things concerning him. And the tribe of Christians so named from him are not extinct at this day.
Obvious additions are, such as 'He was the Christ" since no Jew of the time, such as Josephus was, could be imagined using that terminology. However, a strong majority of scholars, however, have concluded that much of the TF is authentic to Josephus. In his book Josephus and Modern Scholarship, Professor Feldman reports that between 1937 to 1980, of 52 scholars reviewing the subject, 39 found portions of the TF to be authentic. A consensus for partial authenticity is held by scholars from diverse perspectives. Liberal commentators such as Robert Funk, J. Dominic Crossan, and A.N. Wilson, accept a substantial part of the TF as originally Josephan.
Contd.