The notion of a grand designer, god or whatever you want to call it is nonsense. Until someone can bring forward proof that this entity exists no one has a reason to believe it does.
Religion creates magical beings and incidents like miracles so THEY have to proof that this is possible and not the non believers that such magic can not exist.
This entity they create in their scriptures is something i want nothing to do with. The way it is portrait as vengeful, murdering people, genocide, killing newborns and striking down entire cities is not something i want anywhere near me or my children.
People believe out of fear and that is what motivates most religious people, the fear of death, the fear of the god they created in their heads. I would call that schizophrenic if anything.