Why did ancient people say it was a demon instead of a fairy when they saw someone casting spells?

Demon generally refers to all natural phenomena that human beings can't understand, abnormal behaviors beyond common sense or individuals (energy bodies) that can exert incredible power, including all kinds of ghosts and changing things, and belongs to a supernatural existence.

Myth says that people with special abilities can live forever.

The above is from Baidu Encyclopedia.

Demons are more likely to appear in the consciousness of the ancients than immortals, and according to the definition of two races, demons are often more capable, while immortals are often immortal.

Therefore, when most ancient people saw magic, they would think of words such as demon and catching demon. Of course, they would think of catching ghost, but as the definition of demon, demon also includes ghost to some extent, so their views on demon are more common than fairies.

Besides, it was difficult for the ancients to understand and hate the devil, but they worshipped the fairy and longed to realize it. Nobody wants to be a demon, right? There are always so many people who want to live forever but are poisoned by Dan medicine.

This is an ancient cultural habit, mainly because of the obsession with life and death, everyone wants to live long, which is like immortality, so it intensifies the worship of immortals.

Therefore, we can see that people have different attitudes towards fairies.