OK, I read the link. No mention of Golden Dawn? Crowley died in '47, I doubt he sold Page anything. And he did not advocate human sacrifice. He was carrying on an old tradition and wrote in symbols, metaphors, jokes and riddles.
"Crowley's Magick in Theory and Practice is a very popular book among occultists. Given his reputation, it is inevitable that he would appeal to certain rock musicians of the late 20th century. Jimmy Page, Led Zeppelin guitarist and occultist, bought Crowley's mansion, Boleskine House, near Foyers, Scotland, and owns a large collection of Crowley memorabilia.
[Aleister Crowley, The Skeptic's Dictionary]
-----------------------------------------------------------
Led Zeppelin guitarist and leader Jimmy Page has been fired as composer for the soundtrack of the film "Lucifer Rising" by it's director, Kenneth Anger. Speaking in London on Friday, Anger decried Page for time-wasting and a lack of dedication to the project, and claimed that Page's personal problems had made him impossible to work with. Page has been working on the film for the past three years and has so far delivered some 28 minutes of completed tape. The story of the collaboration - and the ensuing rift - goes back to 1973 when Page first agreed to compose and perform the movie soundtrack. He and Anger first met at Sotheby's, at an auction of books by the English Occultist/Magician Aleister Crowley. Both Page and Anger are students of Crowley's teachings. Anger is a practicing Magus (a priest/magician) and his films'of which "Scorpio Rising" is perhaps the best known --- are replete with occult symbolism. Anger himself describes them as "Spells and Invocations".
Page has often expressed interest in the teachings of Crowley. He owns the second largest collection of Crowley's books in the world, and one of his three houses is Crowley's former residence at Boleskine on the shores of Loch Ness. "Lucifer Rising", Anger's most ambitious project to date, deals with the "fallen angel" of orthodox Christian Mythology, who in Anger's film is restored to his Gnostic status as "the Bringer of Light"; an implicit part of Crowley's own teachings.
[Anger Rising]