'Rage' Disease

I would be more apt to suggest that
"The feud bred the disease."
We already have mainstream, widely accepted studies pointing to the physiological effects of anger.
In the future I will be on the lookout for these. I'd wager that Yahweh is right when He said "cursed (afflicted and as a result of your sins) will be the fruit of your body"

Hate begets Hate AND tumors apparently.

From: www.msnbc.msn.com Hatfield-McCoy feud blamed on ‘rage’ disease The most infamous feud in American folklore, the long-running battle between the Hatfields and McCoys, may be partly explained by a rare, inherited disease that can lead to hair-trigger rage and violent outbursts. Dozens of McCoy descendants apparently have the disease, which causes high blood pressure, racing hearts, severe headaches and too much adrenaline and other “fight or flight” stress hormones. No one blames the whole feud on this, but doctors say it could help explain some of the clan’s notorious behavior. Angry tumors and tempers Von Hippel-Lindau disease, which afflicts many family members, can cause tumors in the eyes, ears, pancreas, kidney, brain and spine. Roughly three-fourths of the affected McCoys have pheochromocytomas — tumors of the adrenal gland. “How does it explain the other dozen or so feuds that I’ve looked at in other places?” “The rage and violence as such was not confined to McCoys.”