Final answer:
Chiropractors who disagreed with BJ Palmer's introduction of the NCM lacked support due to opposing colleagues and the absence of scientific evidence. This led to divisions within the chiropractic community, emphasizing the necessity of evidence-based practices in medicine.
Step-by-step explanation:
The group of Chiros who heavily disagreed on BJ's NCM (Neurocalometer) were those within the chiropractic profession who were concerned about the scientific validity and efficacy of this device. BJ Palmer, the son of chiropractic founder D.D. Palmer, introduced the NCM as a diagnostic tool intended to detect and measure areas of skin temperature variation, which were thought to indicate subluxations in the spine. However, some chiropractors felt excluded from the debate due to the strong opposition from their colleagues and the lack of supporting evidence. This disagreement highlighted the tension between traditional beliefs in chiropractic and the growing demand for evidence-based practices within the field. Ultimately, the lack of evidence to support the use of the Neurocalometer led to a schism within the chiropractic community. It is a reminder that in the scientific community, practices must be justified by evidence, and innovations must withstand rigorous scrutiny and debate.