As Dr. Who has stated, the only evidence that God exists is the believability of those who profess to have been touched by God.
Following that logic, Bentwood England U.S. Air force Base. An Airman, a Sargent of Guards, an officer (Lt. Colonial I think), stated that not only had they observed a UFO outside the gates of the Air Base, but stated and entered in the official record that the office touched the "skin" of the craft and determined that it was warm to the touch.
Given that fact that there were three Air Force personnel involved (not likely a hallucination), not likely a hoax, not likely made up, inasmuch as they entered it into the official log book and were subject to military discipline for entering fictitious material. This incident, including the Belgian police sighting, etc., etc., by persons of recognized responsibility, I have concluded that there are indeed UFOs.
Now for Christians testifying to a significant connection to a God, I find that they are less convincing (many appear to be somewhat simple minded), and would appear to be responding to sociological reinforcement of the manifest delusion.
In other words, it seems that there is better evidence (quality of the testimony) for the existence of UFOs than for the existence of God.