Based upon my personal experience, the so-called "trailer trash" (often phrased as "white trash") really aren't like the out-of-control blacks. Many of these folks are poor but proud, descendants of a Scots-Irish heritage (and pro-American). I've been out in the "hollers" of Kentucky, West Virginia and Tennessee but never felt the fear or experienced the brazen outrage that characterizes the urban yute culture.
In short, the tale told by "Deliverance" doesn't square with the reality I've seen. But the incident that spurred this thread is, sadly, far too typical and is the norm for that "culture".
I’ll have to put this delicately,
but the scene reminded me of another type of brawl I saw somewhere...
there was lots of screaming, baring of teeth, chest pounding, and throwing things.