You know what interesting about this post, it's real. It's a cultural thing for sure. I work with a bunch of middle aged white guys. And I am quite sure my sense of humor shocks the shit out of em. They are used to it now, but I've heard guys say they were shocked I made fun of somebody's sister or was cracking on somebody's shoes........ that's just how I was raised. I rode the school bus and it was 90% black kids. It started in middle school with Yo Mama jokes and took off. They used to call it "stinging" or "clowning" on people.
You either stepped your game up and fired back, or you were literally looked down upon for not standing your ground. In a way it was like fighting. If you got off a good "sting" on somebody before you left the bus, you good for the day at school.
May sound weird, but I was raised around it. And when I was around my white friends, it just didn't happen. So when somebody usually says it's a black vs white thing, I kinda blow that off. But in this situation, I agree with you.