Kenneth Anger was not 'puerile'.
Is Thelema really Satanism, as such? I guess it could be considered that but it's not typically an equivalency I automatically make or presuppose.
For classification purposes, it would seem reasonable to separate Thelema from Satanism. The former seems to be a modernized version of ancient Egyptian religion, not directly associated with the promotion of the individual as seen in Satanism.
That's what I was thinking. If I'm wrong and Kenneth Anger was in fact some sort of Satanist, all right, I'd exclude him from the accusation of puerility (if not necessarily from other questionable traits, such as 'having written
Hollywood Babylon'--note that I'm saying 'questionable', not 'unambiguously bad'), but I'm pretty sure he aligned himself with Thelema.