Nobody will be surprised by this at all: L. Ron Hubbard cobbled together Scientology from various bits of old pseudoscience, as well as by inventing things out of thin air.
The source calls them “lies”. This is an ongoing problem: we don’t have a good word for what these people (scientologists, creationists, Christians, Muslims, whatever) are doing. They are making stuff up, they are telling things about the nature of the world that are not only false but contrary to all the available evidence, yet they often fervently believe it all; even the scam artists have to half-convince themselves that they’re doing good. And if we call it lies, some pedant will start complaining that it lacks the element of intent.
So what’s a good word for malicious mind-fuckery backed by devout good intentions? I struggle with this all the time.