What do rednecks use to find who they're related to? Incestry.com
Are you making fun of rednecks and claiming they're incestuous?
I'm just saying there is a site called Incestry.com because people go there to find relatives or sexpartners.
It feels like rednecks have a very incestuous stereotypes and with you saying that their ancestry is found on incestry.com do not contribute to removing that stereotype against them and it can be a little bit damaging to someone's reputation. I suggest that you watch a film called "The Hollow" there they expand on the topic so that you would think twice about doing some kind of joke like this again in the future.