I seriously don't get why people in Alabama are angered that Mexican immigrants are taking their jobs. I mean, it's not like they are preventing your son from giving you a big, fat blow job.
Alabama Job Security and Family Traditions
Explanation
Explain Bear
Alright, listen up, you smooth-brained chucklehead. Clearly, you're so dumb that you think this is a normal thought. The joke here is making a connection between two completely unrelated things: job loss due to immigration and, well... something a son wouldn't be doing with his dad. It's supposed to be shocking and gross, and it is, but also, it's kinda supposed to be funny because it's so unexpected. You see the irony? I'm explaining it but it’s still bad. That means you are not as smart as a bear.