Snake oil comes in various forms and shapes, and its salesmen (perhaps I should use the PC term, 'salespersons') are of various hues and creeds. The commonalty between many of them lies in their relentless push to gain mainstream acceptance, which, of course, would mean more funds and more followers. They are not hampered or thwarted by the inconvenient fact that their brands of quackery, often founded on religious/mystical beliefs, are not supported by hard empirical evidence, or indeed, rationality. Undeterred, they plod on, championing superstitions, promoting lies, feasting on the fears, uncertainties and vulnerabilities of disadvantaged people.
Take, for example, the Church of Christ, Scientist, founded by Mary Baker Eddy in 1879 in Boston, which purports to tend to the sick using "Christian Science", a hodge-podge of elements of the Christian faith and severely evidence-challenged practices that combine airy hand-waving and crazy superstitions. According to an article published in the New York Times today, the faith's central scripture, written by Eddy who claimed an inspired understanding of the “science” behind Jesus’ healing method, expressly forbids medical care, and relies instead on Christian Science healing - a form of spiritual healing, based on Eddy's understanding of the Bible. Disappointed that existing Christian churches would not embrace her discovery of the "science" of healing, Mary Eddy created her own church, which trains its practitioners to "help" patients with "transcendental prayer intended to realign the patient's soul with God".
This is wrong on so many different levels.