How do you know?
Do you have any clue about the history of South Africa much less the racist caricatures portraying black people over the years?
Do you think if it was Tom Brady or Peyton Manning they would elongate the lips and nose bigger?
Because you aren't offended, doesn't mean something doesn't have racial overtones.
If a jewish or gay person says they're offended, I'm deferring to them. I'm not going to tell them you shouldn't be offended, it's misinterpreted. You're making a big deal out of nothing.
If you were drawing an Asian person, would it be kosher to make fun of their eyes? No, because it's some stuff if you don't live in a cave, those lines you don't cross. You don't say, it's just a cartoon, because it shouldn't be done in the first place.
They're never getting a dollar from me.