Not everyone percieves things the same way, and just because something is common in your culture doesn't necasserily mean it's known to people who live in a different culture and don't equate the images to being racist. I can guarantee you that 98% of the people you ask from my country would be like
and would laugh at the guys expressions and not even make the connection between the food he's thinking of and the colour of his skin. I'm not really trying to defend the image, just the fact that what one person sees as racist another person can be completely oblivious to. blame the maker not the poster, I guess is the moral.