As someone who has studied in a country where English was not the dominant language and took classes in a foreign language, I can tell you that my learning experience was hampered by the fact that I was not a native speaker of the language.
You shouldn't let your irrational prejudices and fears come into this debate. My aunt is from Ecuador (OMG!!!! A BROWN WOMAN... SPANISH SPEAKING??? DEAR GOD... WHAT IS HAPPENING) who teaches Spanish for community education and also assists with children who have English as a second language. I can assure you she's not there to instill anti-American wabble-babble in the children. And she's a good democrat, just like her 65 year old farmer husband. And they go to church (Lutheran) every Sunday and work hard and lead happy lives.
OMG.. is that possible for immigrants? NO WAY... brown people aren't capable of that!
Weird how the only person who refered to immigrants as 'brown people' is calling others prejudiced.