He was not a contributor to Satanism, he was associated with Jewish occultism and enemy spirituality. Just as the Gentiles (of which the Satanists are part) have their own type of spirituality, the Abrahamic enemy has his (this obviously does not prevent our jewish enemies from stealing our words of power as in some yoga DVDs where some Jews recite "SaTaNaMa" or even reverse our power words, as they did to create much of their Hebrew alphabet). Crowley was a madman associated with the disgusting enemies of Satan:
"Modern “Occultists” like Eliphas Levi or the mentally disturbed Aleister Crowley or others, were immersed in Jewish Mysticism, while pretending to be disciples of Satan or the Gods. That vilification has been promoted by Christians, Muslims and followers of Judaism, since it conforms with the paradigms they have set that are rife with negativity, evil and misrepresentation"
Furthermore, in general his contribution to spirituality was only negative and tended towards its ruin rather than its realization:
"There are books written about magickal practice, I believe some by Aleister Crowley. These teachings instruct the readers that they must do certain things to break down barriers. This is utter bullshit and I equate it to walking out in front of a large truck in order to see what it feels like to get run over [if one survives]. I am adept. I have never had to resort to any of this misinformation and garbage. Neither should anyone else"
Crowley does NOT deserve to even be considered.
He was also involved with Grays and other ET enemies of Satan. Once Crowley actually drew one of the entities he worked with (called "Lam"), the drawing depicts just another gray alien. (the grays are behind Christianity, they are enemies of Satan, of the Gods and of the Humanity, generally speaking this is the case, later in your JoS studies you will understand more things that it would not make sense to explain now). Crowley just got fooled by these ETs. Don't read his writings, please...