There is evidence that these illusionist are performing illusions.
Unless it's a secret, which it usually is.
Where is the evidence that demons are involved?
Some claim it themselves and use matching symbolism and rituals, some tricks are naturally impossible.
So i suggest to look for 'demon magicians'.
There is quite a bit to be found about it, with compelling footage.
The question then becomes, which explanation is more plausible.
And what's left when there is no natural explanation?
For starters, there is doubt.
Jurors got a rare
behind-the-scenes look at a David Copperfield disappearing act Tuesday during testimony in
a negligence lawsuit....
....
Popovich told the jury of eight women and four men last week that 10 minutes before Cox fell, Copperfield safely
walked through that same area as part of another illusion that did not involve audience participation.
Lawsuit leads to revelations about David Copperfield's act
Either way, they don't intend to let the public know for certain how tricks are done.
And if it is occult, it is always hidden, except for the initiate.
Not saying it is always occult when you don't have a natural explanation, of course.
I think you can compare it to selling your soul for fame in the music business.
It seems this is a thing in all of entertainment.
The symbolism and the depravity that seems to come with it (drugs, sexual deviance, etc.), is often easy to see.