I'm reading it as a joke like "yeah sure, a guy named Jesus was born to a virgin and rose from the dead"- which is about as likely as Peter getting bit by a radioactive spider and swinging from skyscrapers with his webs. Has nothing to do with whether either are influential on society. Of course they both are to varying degrees. One is treated like Greek, Egyptian, or Incan gods or priests or whatever comparison you think best maintains the spiritual elements. The other more like Santa, where kids believe it only so long as their peers and adults play along.

Imo, as long as we move forward as a society eventually to recognize the mystical parts are bullshit, who cares. Humanity collectively still seems to be in Santa stage wanting miracles to exist.