By Mr. Terence Chua, who really should be reading about the Hatfield-McCoy feud right now

Okay, so how much did the cultural background/milieu of south-central Appalachia contribute to the feud?

Did this originate from the clan tradition of the families' Scots-Irish forebearers? Or from the greed of outsiders wanting to stir up trouble? Or a combination of both? Or is all that bushwah?