I don't think it was just made up. I just can't quite seem to understand why hallucinations would be improbable.
The mass hallucination theory is merely one of the theories
contra a physical resurrection of Jesus. Its critical failure is of mass hallucination. As the witch said in
The Silver Chair (C S Lewis), you can’t expect others to share in your dream. Fact was, it wasn’t a dream and others shared in its reality, as the witch well knew. Mass hallucination doesn’t fit the facts.
In a desert, light might so reflect an elsewhere oasis, that several people see it, but they really see what a camera could see: speaking of which,
. A true visual. How did light reflect a past Jesus, who even prepared a meal for some?
Folk on the
Enola Gay all saw something, or was it mass hallucination? The results say otherwise. Did Saul-Paul both see and hear what others did not? Yet how was his blindness healed? And how did he mediate so many miracles? Did the group of circa 500 see what each other saw? Did Pentecost really have visible phenomenon as flamelike lights, and what happened to those 120 for Christianity to explode into the dangerous public domain and call out their government? There was real phenomena consonant with a real physical resurrection and consequent invasion.
As Socrates said, let us follow the evidence, whether we dislike or like the journey. The facts can take a horse to water, but it is up to the horse as to whether it drinks. It might not like the reality of the water.