It said:

Besides the mysticism of the whole field, I'll tackle the real tangibles. Others can decide whether or not they believe we have a life force which can drive bodily healing.

The biggest aspect is that they aren't trained to be physicians. No Step exams or Comlex to see if they meet the minimum qualifications. No regulation by any medical board in some states (also a liability issue). Most of their knowledge is not evidence based, as most naturopathic medicine is not researched, nor funded for research.

Then there are individual NDs who believe in natural cures for cancer and do not promote vaccinations <-- this alone is enough to make voice opposition against them.

I would have no problem if they simply referred to themselves as Naturopaths, but many use the title Doctor, just like DCs knowing it has a certain public perception.

As for the liability, it really depends on the state. Some states they are required to work under a physician. No problem there, they assume the liability and there is malpractice. But what do NDs really offer? They can't perform surgery, do any procedures, most are limited in the drugs they can prescribe, it isn't that they are a risk, its that they can't take them. If Pts have an emergency, they go to the ER, a doctor must see them and treat them even if they are a huge risk to the hospital. A family doctor has a patient with chronic multiple co-morbidities, they can't just fire them and say, go find another doc. NDs can. They don't have to take anyone they don't want and if their patient gets measles, they can't get sued for not offering the vaccine, because they couldn't anyway.

If you're going to give people the impression that you are a "doctor" than that means you have to provide the same standard of care, be able to do so and have the same responsibility.