The belief of a creator is genetic and here is why. One does not have to be religious or in a religion to believe in a creator. A child could believe in a creator and not have much exposure to religion or religious belief. This aligns with how morality is also encoded in our genetics. Same as any other creatures have instincts but much more complex due to social structure. This is simply information which is encoded in our genes that is passed down through our parents and their parents and so on.
So in a way if you belittle someone’s beliefs in that sphere, you are kind of a bigot because it’s nothing the person can or wants to change about themselves.