A decade ago, I read Steven McKenzie’s King David: A Biography(Oxford University Press, 2002). What I soon realized was that the Bible creates propaganda to sell faith in its God, especially though famous characters created to promote belief in Israelite monotheism; be they Abraham, Moses, David or Jesus. These embellished Super Heroes function like our comic book (now in movies) Super Heroes such as Superman, Batman and Spiderman battling the forces of evil for a world of good. But these idealized figures simply function to serve our fantasies in a world where reality is fraught with suffering and injustice
Debunking Christianity: King David and Jesus: The Bible’s Mythic Super Heroes
It is not a new argument. I have posted and talked about this subject a lot on this blog. Instead of dredging them up, let's instead look at how Chris Sims answered this question.
Chris Sims is a blogger, comics writer, and simply brilliant and he happens to be an atheist. I do not agree with everything he says and writes but he is spot-on here.
The idea of Superman as a Christ figure is the herpes of pop culture criticism. No matter how hard you try to get rid of it, it just won't go away.
It's a popular interpretation, but the thing is, it just doesn't work. As I understand it, the entire deal with Jesus in a nutshell is that he was the Son of God, divinity made flesh who was sent to Earth in order to instruct us as a teacher and then sacrifice His life, redeeming the whole of humanity for its sins through His suffering on both a literal and metaphorical level. There's a little more to it, of course, but for more details, you can check out around 90% of the rest of Western art and literature.
Superman's story, on the other hand, has nothing to do with any of that. The core of his character isn't about sacrifice or redemption at all, it's about having power and choosing to use it for the benefit of everyone rather than just using it for yourself. The comparison seems to be entirely based on the idea that Superman's a really nice guy who came from somewhere up in the sky. That's about where the similarities end.
Jor-El is not Space God. He doesn't send Superman to Earth for our benefit, he sends Superman to Earth because it's the one place in the universe where his son can survive and thrive. He's protecting him, not sacrificing him, and humanity's need for someone to fight robots and Brainiacs doesn't even cross his mind. And, to paraphrase Grant Morrison, I'm pretty sure Heaven didn't explode shortly after Jesus was launched down to Bethlehem.
Superman's morality isn't divine or innate, either. It's not something that he was born with, and it's not something that sets him apart from humanity. Morally speaking, anyone can be as Good as Superman; the only advantage he has is that he was brought up by a couple of really nice farmers. He's an aspirational figure rather than a redemptive one, who shows us that we all have the ability to use our talents for good, we just have to choose to do so.