what is the point of calling rednecks rednecks?

It made more sense than magenta necks.

Why not call it as you see it?

maybe they haven’t found themselves yet and you are helping

Because dumbass was taken by people who ask stupid questions.

The popular etymology says that the term derives from such individuals having a red neck caused by working outdoors in the sunlight over the course of their lifetime. The effect of decades of direct sunlight on the exposed skin of the back of the neck not only reddens fair skin, but renders it leathery and tough, and typically very wrinkled and spotted by late middle age. Similarly, some historians claim that the term redneck originated in 17th-Century Virginia, because indentured servants were sunburnt while tending plantation crops.

And all the redneck jokes sound like they don’t work!

It is just another racist deflamatory name calling instance like calling white people crackers.

The word “redneck” originally referred to poor, white southern farmers who got sunburned necks from working their fields. Eventually, the term’s definition was expanded to include all white southerners.