Did Jesus exist at all?

[Mudhammam]

Again?
Yes. Of course. No serious historian has provided evidence that Jesus existed.
Next question.

Fixed your post for accuracy. Biblical "history is essentially theologians playing at history, very badly. Good historians tend to steer away from the jesus stories because there is little to no history in them.

I see. In other words, to engage you on a topic of which you obviously don't know--nor care to know--anything about, would be akin to squandering my time educating creationists on how the "scientific method" works. As you probably don't know (but should), historians also have methods, and among secular historians basically none of them doubt that Christianity began when the man of whom the early Church proclaimed to be the Son of God was crucified by the Romans. 
Enough said.