There is a world of difference in believing in a supernatural being that created the universe (even the Big Bang theory does not have any idea where the initial tiny dot of matter came from which supposedly exploded into the current universe) and the belief that individual non corporeal spirits roam the earth and communicate to us through shaking tables and moving pieces of a ouija board. And it is certainly true that one can believe in the existence of a single God as the creator of everything without also believing in the Christian theology involving Jesus of Nazareth.
The origins of our reality, our universe, as well as the origin of life itself can be seen as rationale for the existence of God, in whatever form he/she/it may be. Nothing in my experience would point to the existence of ghosts, or fairies, or angels invisibly floating among us. Personally, I believe in the reality of God, but do not see him/her/it being involved or determining the course of individual lives. Something like the beliefs of some of our Founding Fathers, who believed in the image of God as the "Great clockmaker" that created everything, and set the universe into motion, but then has been uninvolved in what has resulted. And since as thinking beings we have a degree of free will, how the universe and our earth evolved was not all pre-ordained by the actions of God. I also would like to believe that there is a conscious existence that we will experience after our physical death, but for the most part I think that when we die our brain, and consciousness, and what some call the soul, just quietly goes out of existence as we return to the earth from whence we came.
So a ouija board may be fun to play with, but I would not attribute any supernatural events to what it tells us.