Hold your horses, your example is not equal at all.
Your example was specifically created to mock black people, specially in a racist way. It's already a recognizable image for this purpose only.
The thumbnail in this article, it's most people's first time ever seeing it, and it was created by Mexicans for their own article to help better understand Mexican culture.
Big difference.
As a Mexican, this doesn't offend us at all, heck, if you've ever been to Mexico you'd find that all of our tourist spots sell souvenirs depicting Mexicans like this. Getting offended by a dumb cartoon only gives more power to the cartoon, there's bigger stuff to worry about.