There are people who intentionly spread lies about chiropractic history. One of them is Stephen Barrett.
He writes :" Chiropractic theory is rooted in the notions of Daniel David Palmer, a grocer and "magnetic healer" who postulated that the basic cause of disease was interference with the body's nerve supply. Approximately a hundred years ago, he concluded that "A subluxated vertebrae . . . is the cause of 95 percent of all diseases. . . . The other five percent is caused by displaced joints other than those of the vertebral column."  He proclaimed that subluxations interfered with the body's expression of "Innate Intelligence"—the "Soul, Spirit, or Spark of Life" that controlled the healing process. He proposed to remedy the gamut of disease by manipulating or "adjusting" the problem areas."
That quote is from 1895. Two years before he started to teach chiropractic.
1896 one year before he started to teach chiropractic to other people he said: "I do not claim to cure all diseases , but I now treat and cure many diseases which I had not thought of doing five years ago.
Medicine and medical doctors are necessary, we cannot get along without them. But they cannot cure everybody. Neither can I. I especially invite those who have tried all other remedies and have failed to find relief."
That was his opinion one year before he started to teach chiropractic, so it is obvious that is not true that he made some kind of religion of the 1895 quotation. Of course he had some strange ideas but he struggled to learn more about the body and spinal adjusting.