Santa:

We can talk about Santa. We can talk about history. People can believe in what they want to believe in. When we talk about Santa, we can talk about different versions to his story and then we can talk about source materials for Saint Nick and/or others.

God

We can do the same thing with God by tracing back the story of the fictional and/or non-fictional character and/or creator through history. We can look at how cultures from all around the world would pass on their own version of some kind of world flood.

Origin

What I would ask you is where do we come from. Was it evolution via the big bang and/or creation through some kind of creator and/or other things?