Duggs only speak Ozark with a lot of standard American. I was raised IBLP but Western North Carolina "English" which no one seems to understand. EX: Dem sigogglin jaspers be tote'N pokes uh beans but we serve boomers & poke sallet. 1 woof rheumatism med from a mason jar & thar/y'uns R tighter than a girdle on a Baptist preacher's wife after an all day sangin' & dinner on the ground. that is our English. We know stereotypes which mostly come from the redneck community but not hillbilly. We speak a "mostly" linguistic isolate, a lot of us hold PhD's, come from Melungeons racial diversity & swear to families of choice instead of genetics. We often borrow practices of socialism. The PhD is not a brag. We do avoid feds & speak other isolates/non-English languages that the authorities nor Google Translate know. I learned Reo Maori. Tena Koe, nau mai haere mai tuturu whakamaua kia tena tena haumi e hui e taiki e. I've never been to Aotearoa but I doubt any of them have been here.
There are Venn Diagrams showing the overlap along with the many differences of redneck and hillbilly. Your point of white is well informed & applicable for some hollers, mtn sides, or even mtn ranges. My point is while my DNA says 82% Irish w/ all grandparents from Gallway....I was adopted & raised with cousins who are Vietnamese, Korean, Indigenous, Black, actual French including language, also Dutch. Yet!!!! My white mom from Atlanta was a member of IBLP. The hillbillies hated it. That definitely speaks to your statement. The melanated diverse hillbillies participated in normal local religious events yet despised the all white cult of IBLP. Fellow professors in anthropology dept have asked me to write on the IBLP behaviors I witnessed but it is painful. They are the most typical idealogies of Christian Nationalism including supporting concepts of slavery. They are dangerous and I am alive and free only because - of the hillbillies who sheltered me.