I should think it very important it it can be proven that Jesus of Nazareth is a fabrication.

Well, that's not quite the same as proposing to prove he never was; which cannot be proven.  Any more than one can prove there is no God, etc.

As to a "fabrication," the evidence so far advanced certainly has not persuaded me.

P.

“What I admire is honesty and truth, no matter who, or what, the sources are.”
— Uri Yosef