How do you circumcise a redneck? Kick his sister in the chin
Why Rednecks specifically?
They're uncultured and still have incest in the meantime.
Propagating that rednecks participate in incest creates a negative stereotype about a group of people. It's insulting to make such a statement about all southerners. Think about how you would feel if your group of people was viewed in such a manner.