Since the atheist knows there is no naturalistic feasible explanation for the disciples believing they saw Jesus resurrected, the only route they can grab onto is to say the authors of the entire NT were fabricated and made up. Of course this fails because Paul really did write 1 Cor. 15, Gal. 1 & 2, really did meet the Apostles as he said he did. Peter really wrote his books, John wrote his, Luke wrote his, Matthew wrote his and Mark wrote his. Jesus is the most highly documented person in antiquity within 150 years after their deaths.

It's a done deal. That's why Christianity is the largest religion in the world.