fallingblood
Agnostic Theist
No one was doubting the existence of Jesus though. Even the opponents of Jesus and Christianity never even suggested that Jesus was not a historical figure. Simply, there was no suggestion that Jesus didn't exist. So why try to verify something that everyone already agreed upon? Why run when no one is chasing you?Perhaps Eusebius came to realize that his biblical Jesus was actually a fictional character, and he decided to try to make him look legitimate by incorporating mention of him in the works of a respected first century historian who was not a Christian, thus supposedly providing some outside verification for the existence of Jesus. Perhaps Eusebius felt he had to add very affirmative passages because the biblical Jesus had supposedly been very convincing. Of course I am just speculating as I have no records with Eusebius explaining why he did what he did.
To sum up, your argument makes no sense as no one was doubting that Jesus existed. We have no record of anyone doubting Jesus existed. It would not be until much much later that the idea would pop up.