Precisely. The church in the middle ages labeled witches and other pagans as "Satan worshippers" in order to discredit and persecute them. There is not one shred of evidence that anyone worshiped Satan prior to Christianity. The only evidence Satanism existed is from accusations by the Church itself.
Witchraft, such as it was, was allowed in the middle ages in England. The Church ignored it. Only if someone was accused of plotting to kill the king through demonic practices was it prosecuted. An example would be the false story put about that Richard the Third had Jane Shore arrested on witchcraft charges after she “withered” his arm. In reality, he had her arrested because she was a co-conspirator in a plot to murder him.