Humans cannot walk on water, this can be tested and proven. If Jesus was a supernatural being, he would have still been bound by the physical limitations of the human body he inhabited. If Jesus was a real person, his life was also recorded orally, which means it was open to all sorts of exaggerations and misinterpretations. Tell 10 people the same story and by the time it got back to you, parts of the story would have been altered, added to, or entirely omitted. No different to say Ragnar Lothbrok (who may not have even been a real person), whose life was only recorded in writing centuries after his death and thus subject to oral and literary exaggerations and misinterpretations as the stories about his life were passed on.
We know the moon is not split and has never been split. We can observe as such. There are even Muslim scholars that dispute this and view it in a more metaphorical light.
Now can you rationally and confidently make a case that there is no life beyond what we know? We cannot set foot on Mars, let alone know what is going on in the billions of galaxies in the universe that we cannot even view in detail nor communicate with.