I do personally think that stress, keeping emotions bottled up, anger, etc., can lead to disease and/or exacerbate a genetic predisposition to disease. But certainly some if not most disease can be random and unexplainable.
I agree with you that stress can be correlated with a myriad of diseases (e.g. hypertension). However, the uniformed posting to this topic seem to think that Molly Ivin's aggressive liberal tendencies or her lack of faith and spirituality (typical of liberals) caused her cancer and her progression over 6 years to the metastatic setting. The reasons for her disease are related to biology rather than to spirituality or politics....