Political Weirdos

Its a dogwhistle. That's what racists do is they'll have some dogwhistle to signal to other racists that they're also in the in group. In this case it's intentionally listing out the owners full name so they can see his name initializes to K.K.K. (which i pointed out in another comment that most businesses in small towns don't specify a first name, it's just "lastname's type of business" so in this case "Kistlers Engine Repair" since you don't know if it'll be Kermit or Emmit or Kermit's grandson John Kistler serving you but you at least know it'll be a Kistler running the place)

I think it's more like, if you knew your initials were a dog-whistle, you would probably keep that on the d/l or change your name. Instead, putting it on display is like saying that fact is not a deal-breaker for you or your business.