Fundamnentalist
A stick-in-da-mud person who stubbornly/arrogantly believes in da strict, literal interpretation of scripture in a religion; actual life/historical facts and experiences be hanged!
Da problem with "Bible-belt" Fundamnentalists is dat --- figuratively speaking --- they don't have any extra holes in da cinch-up strap for their waistbands to allow for adjustments. But not everything in life is totally black or white, so problems and stubbornness issues are bound to arise from said lack of flexibility or open-mindedness.
fundamnentalist
A "strictly-by-da-book" bible-thumper who either uses salty language to accentuate his preaching, or claims dat you will suffer total "fire 'n' brimstone" at da hands of Da Great One if you don't follow His word to da letter.
If being or following a fundamnentalist means aggravating fellow humans about my supposed religious beliefs and/or breaking my staunchly-practiced "no potty-mouth" principle, I reckon "Ell Passo" on dat, thank you very much! :P