When John Dee invented the Enochian language, he was using a mystical Aztec artifact, known as "the eye of Texcatlipoca," a channel for an evil god. When Dee decided to call it "angelic" he was just making himself look like a nicer person.
If you read through old grimoires, you will find that the magic words which invoke the powers guaranteed by their demonic pact are often "in the name of jesus christ" or some similar hogwash. If they used different magic words, they could have been burned alive or mobbed (or worse.)
Anton LaVey could afford to be honest.
"When everyone is reading Neitzche, I'll be watching Don Ameche." ASL