Let's just assume that they are authentic for the sake of argument. It's still entirely meaningless. Written after the first two gospels, it's not a primary source, contains scant reference to Jesus and on top of all of that a historical basis for Jesus doesn't make a single shred of supernatural events of the Bible any more true to start with.
I've always found the debate over a historical Jesus pointless. If he was or not based on a historical person, God is no more real because of it. So whether Josephus wrote about Jesus doesn't change that the central character of the whole thing yaweh, is totally made up.
I've always found the debate over a historical Jesus pointless. If he was or not based on a historical person, God is no more real because of it. So whether Josephus wrote about Jesus doesn't change that the central character of the whole thing yaweh, is totally made up.