It's not a need. We are unable to simultaneously hold a belief in a god which presents no evidence, and in reality as we understand it with abundant evidence.<quoted text>
Why do need to not believe in God?
Some people can do that.
Would it be possible for you to start believing in Santa again?
If not, why not?
If so, what would convince you?
I certainly don't see any presence of god in the vast majority of his believers.