First off you do have evidence of his non-existentence. Which I gave you. No one can keep their story straight about him. Secondly even if you didn’t have that you can say the same thing about unicorns.
You’ve given no such thing. You have made a statement that extraordinary claims require extraordinary evidence, but you fail to grasp that the existence of Jeaus would not be extraordinary. Billions of people have existed and will exist. The extraordinary part is the sin of God thing, which we don’t disagree on. Unicorns , much like “The Messiah”, are certainly extraordinary claims that would require proof. We have seen nothing to support the existence of anything even resembling unicorns. We have forever seen plenty to prove that humans exist. A specific human some thousands of years ago, is not unlikely.
And? And so, the claim that he exists is hardly extraordinary.