I personally am not a conspiracy theorist, and for many of the conspiracies, such as aliens, I don't really have much to say either way on the subject. But I would like to point out a few of the reasons I do say that a majority of conspiracy theorists are barking up the wrong tree with many of their ideas about occult involvement in certain circles, especially Aleister Crowley. For one thing, it's constantly pointed out that Crowley was a Golden Dawn member at one time, and that he therefore knew some of the well-to-do members, and this is often used as evidence of him being behind certain political acts. However, what is usually left out of these accounts is the story of what happened to the Golden Dawn, and why Crowley left. The fact is, he was not liked by the majority of members, and he was refused the higher grades because of his bisexuality. After his departure, he and the founder, MacGregor Mathers, had a nasty and public feud in court. Shortly after, the Order crumbled. Also, the founder, Mathers, was a coward scared to death of any sort of "negative" entities or Black Magic. He once pulled a pistol on a member and started screaming at him out of fear because said member would not stomp chanting a mantra meant to rouse Shiva. The inner "secrets" of the Golden Dawn were very basic, and didn't go much farther than basic ceremonial magic, tarot reading, and astral projection. The often said statement that sex magic was practiced there is completely wrong, caused by confusion with Crowley's later work after leaving the Order. In truth, their leader, Mathers, never even made it to the top of his own grade system.
As for Crowley and the Nazis, yes, it is true that the Nazis, mostly Himmler, were interested in utilizing occult powers. It is also true that Crowley made an attempt through one of his German members to influence Hitler. But, it didn't happen. Instead, once Hitler came to power, Crowley's O.T.O. lodges were singled out for persecution just the same as Jews and homosexuals, and all of Crowley's German followers who didn't get out in time were hauled off to concentration camps. The thing is, there are many factions and opposing camps in occultism, and the Nazis' brand of occultism was far removed and in many ways diametrically opposed to the system in use by Crowley. Furthermore, while we can't prove it, Crowley always claimed that he was consulted by the British government for tips on how to counteract the Nazis' occultism, or, at the very least, get some ideas as to unnerve the Nazi leadership by making it look like they were countering with occultism of their own. According to Crowley, he told Churchill that the Nazis are obviously obsessed with Solar forms of spiritual energy, so, he told Churchill to make the "V for victory" hand gesture as often as possible in public, because in the system Crowley learned in the Golden Dawn, that hand sign represents Typhon, so he hoped it would make the Nazis nervous that Churchill was utilizing a lunar current against their solar one.
And there is no need to speculate on which spirits Crowley was invoking in certain famous cases, such as the time in the desert when he allowed himself to be possessed by Choronozon (not Thoth, mind you) as a test of his will and as part of his pathwork on the Tree of Life. This was his method of "Crossing the Abyss." Crowley kept voluminous diaries and wrote and published his activities on a regular basis. But, I suppose it's sometimes funner to some, or makes it seem scarier and more sinister, to speculate on Crowley's activities rather than just dig into the source material and hear it from the man himself. In short, what I'm getting at is trying to learn about occultists from sources hostile to occultists is about as useful as learning about Judaism from a White Supremacist.