I live in Tennessee and can tell you with certainty that the majority of us are not hillbillies nor do the majority of us claim to be hillbillies. Let alone proudly. Any that do don't represent the views of the average Tennessean and need to brush up on the demographics and geography of their own state.
Hillbillies, by definition (below), live in rural mountain areas. Particularly the Appalachians. The Appalachians are a small slice of the Eastern third of our state (and extend far north and south of Tennessee) and aren't even predominantly settled by the people that fit the definition of what a hillbilly is.
"Hillbilly is a term (often derogatory) for people who dwell in rural, mountainous areas in the United States, primarily in Appalachia and the Ozarks. Due to its strongly stereotypical connotations, the term can be offensive to those Americans of Appalachian or Ozark heritage."
https://en.wikipedia.org/wiki/Hillbilly
Your views about Tennesseans are based on assumptions and ignorance. Class dismissed.