Parsons was a techy nerd who liked rocketry. He was not driven by the goals of the elite or by the elite. However he got connected to Caltech, and there are some elite connections with that school that influenced JPL.

As for Crowley, that was brought in by Hubbard when Jack shared his home with him. But Parson was never truly into Satanism.

The book Strange Angels is however a good read about the background including how Hubbard was one son of a bitch and used Parsons.