Do you think its wrong to mock religion?

Whoah, you've jumped from talking about The Gospels to the entire Bible. Genesis, if taken fictionally, would be an allegory or creation myth, not a parable. Genesis is far more complex than any parable, which is why it's been read in a variety of ways, with different aspects symbolizing different things to whomever was doing the interpreting. It's far more "open" than an actual parable like The Prodigal Son or The Ten Virgins.

I think you need to read up a bit more on what a parable is. I wish I could find the post way back where I explained the difference between different modes of symbolic storytelling. Frequently, parables are little more than extended similes or metaphors, while in allegories the simile/metaphor aspect is not directly stated but is merely implied. That's also probably why many people DO take Genesis (or even Revelation) literally, because they don't explicitly state their symbolic nature. However, it's a trivial point that, even if you take all of The Bible as being symbolic storytelling (it's not; much of it also functioned as Jewish law) it wouldn't all be parables.