Ok this is impossible to argue if you do not believe in the existence of a God.
If you do not yet, please go read God is inevitable.
Only when you start to see him - you can start to see Jesus in the whole picture (at least that is how I came to that conclusion).
Ok, let's start with some basics:
Historical evidence is not the same as emperical evidence.
There is not one serious historian who denies his existence.
In fact let's list all the things that most historians see as absolut facts these days, you might be surprised.
Was denkst du?