Chiropractors have been awarded the right to use the honourary title “Dr”, just like medical doctors have been (the standard medical degree is a dual bachelor of medicine and surgery). Unless anyone has completed a PhD or Doctorate, the title is honourary.
Chiropractors don't hold an M.D, so they aren't medical doctors, but they graduate with a doctor of chiropractic degree. They do have extensive training in chiropractic care and are licensed practitioners. Chiropractors begin their education by getting an undergraduate degree with a focus on the sciences.
In my nearly 40 yrs. in Radiology I have known good Doctors and bad one's and nurses with inflated ego's. Known some good Chiro Doctors as well, one straightened my back out after I fractured it in 2 places, idiot MD surgeon wanted long rods up and down my spine to impress his residents. Long story. But the point is there are good one's and bad ones everywhere and people with narrow minded Brains that can't tell the difference like.