As far as I understand, he doesn't think it is autoimmune. He thinks it is caused by a virus and that messes up the immune system.
As I see it, that would be good news, because a viral infection would probably easier to treat. Just find the virus in question and then work on antivirals against it. With the right amount of funding, a working treatment or even a cure could be found pretty quickly (see HIV/AIDS).
Yes, I wasnt referring to Montoya but rather to those who have thought that ME was an autoimmune or autoinflammatory disease.