CG: The other mentioning of a Jesus most experts agree this texts was a forgery.
What is the source for this? from Wikipedia:
The general scholarly view is that while the Testimonium Flavianum is most likely not authentic in its entirety, it is broadly agreed upon that it originally consisted of an authentic nucleus, which was then subject to Christian expansion/alteration
There is IMO a lot of questionable assumptions floating around in the atheistic community on Jesus mythicism.