There is literally more evidence of Jesus than there is of Shakespeare.
i do not know about that, but atheists usually parrot the argument that the absence of contemporary (meaning within His brief approx. 33 year life!) non-biblical evidence that Jesus was a real person means he could not have existed, yet by that measure, neither did Siddhartha Gautama, Confucius, Spartacus, Pythagoras, Sun Tzu, Leonidas the Spartan, Boudica the Celtic warrior queen, Sargon Of Akkad, Socrates, Archimedes,
and maybe even Alexander The Great, and Attila The Hun, and Homer, whom historians overall affirm existed, as they do Jesus of Nazareth,Likewise, requiring writings from the figures themselves negates many.
However, without any actual proof, atheists overall believe that an exceedingly vast, systematically ordered universe, exquisitely finely tuned for complex life with its profound intricate complexity and extensive diversity, can be all a result of purely natural processes.
Which requires much faith, more so I think, than that the universe logically testifies to design, requiring a First Cause (at the least), that of a being of supreme power and intelligence being behind the existence of energy and organization of matter, and laws regarding the same.