Joke Collection Website - Joke collection - What does the Mexican black-and-white joke in The Executed mean? What's so funny?

What does the Mexican black-and-white joke in The Executed mean? What's so funny?

It seems that Mexicans and blacks have gone back to their hometown, and whites have nothing to do, so they have to ask for a can of coke.

If I understand correctly, this is a pure racist joke.

Of course, if you understand it wrong, please ask an expert to testify.