He refers to the infiltration that has happened all on the name of islam .
To understand this we have to go back .
Allah sending all his messengers with the common messege to worship Allah , along with powers and miracles for people to have faith .
The path is good .
Satan on the other hand is dedicated on his mission that he would lead the human species away from truth .
So Iblees and his companions ( shyateen djinn ) appear to misguide humans . By showing off their illusions/powers . And calling people to worship them.
The path is evil .
This is why we see all those animal gods, shapeshifting gods , gods of fire etc . In ancient greek , egyptian and indian historical books .
Then eminent messngers of Allah start coming ,
They call to good , while shayateen call people to evil . If a prophet on Allah's will showed a miracle ,
They used to lure people that you can have special powers too with authority if you follow us .
For this Allah revealed two angels , haroot and maroot , who used to teach people magic .
But with a warning that learning this is kufr and it would lead you to way of satan .
( This was done to save people from getting tricked by satan )
But in the end a set of books named KABALLAH was formed , during hazrat suleman's time .
Credit to the kaballist jews , who learned it out of their greed .
Hazrat suleman burried these books beneath his throne , after his demise , satan again came to the next generation of jew rabbii's , and told them that the secret of hazrat suleman( AS) 's power is burried under his throne .
They took out the books of kaballah , and then 70 rabbii's wrote a book called Tilmod in babylon ( presently kufa of iraq). They mixed the kaballah with relegious scripture and here it became a part of the jewish faith . Which later misguided them to the extent that they rejected EESA ( AS ) .
Then islam came , and now your question is answered. The Kaballah is infiltrated in islam by means of these magicians - by names of different uloom , they appear to you as a muslim , but in reality they are the ones who follow the kaballah .
These people are muslim by name and signs ,
But are luciferians in reality .
They would make you do All the things that are against the principles of islam .
Eg . Sacrifice animals in the name of a being other than Allah .
Pay visit to graveyards and recite something ( normally the reverse meaning of quranic verses )
Throw livers and lungs of animals in graveyards and moving water .
Things like that , and then when a person hesitates they say oh give us money we do it for you and your wish will be fullfilled .
Some are real magicians , and some are just fake .
The things is , that if anything is found against quran or hadith its a warning signal .
It is actually these magicians who are spreading the evil of kaballah , under the hood of islam .
Intentionally or due to lack of knowledge , Only Allah knows this .