The schtick is that the cows write the advertisement saying things like "Eet mor chikin" (instead of burgers, which are cows), and it's spelled wrong because they're cows. Chick-fil-A sells mainly chicken.
I'm all for criticizing idiocy where it's due, but in this case it was likely done intentionally.
I don't think anyone would be upset if the white house smelled like curry. That would be a nice atmosphere. But what's racist about the rest of it? I think this all went over my head.