An interesting article on some levels, but Crohn's is not an autoimmune disease and the fact that the author does not know this tends to discredit it in my view.
Comments like this also make my blood boil:
In his 2003 book on the link between stress and sickness, When The Body Says No, the Canadian physician Dr. Gabor Maté writes that in nearly every autoimmune patient he has worked with, "underlying emotional repression was an ever-present factor."
Indeed, a growing body of research has found that stress, childhood trauma, anxiety and other psychosocial factors can play a role in the development of autoimmunity. One study found that patients with rheumatoid arthritis often report having experienced emotional neglect and abuse in childhood, while another found that MS patients exhibit "insecurity that drives their need to seek greater love." Similarly, lupus patients frequently report histories of childhood emotional deprivation.
I strongly believe cause and effect are pointing in the wrong direction here, deterioration in physical health is leading to mental health issues and not the other way round. Articles like this just perpetuate the nonsense that "it's all in your head".