Since I'm not Christian, I can't answer for them. However the problem you face is that some people are given evidence that proves the existence of the supernatural. My experience is only one of my experiences with supernatural entities. The majority of which happened because, as a skeptic, I refused to believe there was a danger or refused to believe in those stories. Some stories I heard only after my experiences. Nothing we can say or do would convince you that our experiences are real. You have to experience them for yourself.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." Thomas Jefferson