Both rheumatoid and Alzheimer's have been associated with high carbohydrate diets (grain, fruit, sugar etc.) Some researchers believe Alzheimer's is a form of diabetes. Meat does not cause diabetes, carbohydrates do.
BTW - Neal Barnard is a psychiatrist and PETA believes humans are better off dead.
I can’t eat a lot of carbs because I also have low blood sugar. Double fatigue whammy. Can’t take auto-immune fighters cause I need to keep my immune system active.