That's because the Catholic church holds the real spiritual power. It was the Church established by Jesus Christ and is the ONE TRUE RELIGION.

Satan and his demons go where the POWER is.

Satanists mock Catholic Sacraments. Satanists do not mock Methodist traditions, not Baptist traditions, no. Satanists steal the Catholic Holy Eucharist and hold "black mass" which is a mockery of the Catholic mass.

Satanists use the power of confession to wash off sin and become pure for demonic possession.

The highest witches and warlocks belong to the Catholic church not because the Catholic church is evil but because the Satanists have real power for being Catholic. It's a cloak they hide behind.

https://www.youtube.com/watch?v=QdlE8-B0cOk