Nothing racist whatsoever about it. It applies to any immigrant/potential immigrant of any race. And I agree wholeheartedly with the sentiment--if you are in the United States, and not a tourist, then, by damn, you should speak the language of the country, which, for the US, happens to be AMERICAN ENGLISH.
The only group who seems to think differently are the "La Raza" guys--who by the very name they chose, are the REAL racists. All the other non-English-speaking immigrants have learned the native languge and are, by and large, succeeding.
Maybe the other loony rants against FR got him thinking he can grab a little PR by bashing us too. I feel sorry for him.