I went to the university in Bolivia. Due to several reasons, during my first year the number of brazilian students was more than three times the number of spanish-speaking sutdents, just in my class 75% were from Brazil, the rest of us from Bolivia, Peru and Paraguay. Most of the brazilian students didn't know a bit of spanish, so at some point they required classes in portuguese. Even though they tried several times the dean never agreed to such thing, as he explained the official language of Bolivia is spanish and that meant they had to learn in spanish. I remember one of my teachers, a great guy who besides spanish also speaks protuguese, he used to help some of the brazilian students but always outside the class, the official class was always in spanish.
Why do i mention this? Because most of the educational systems around the world (if not all) would not make the concessions the US educational system gives. I think that spanish-speaking groups take advantage of this, and in my opinion this can reach a level of disrepect, i honestly believe that if you want to live in a english-speaking country then you must learn the language, i expect the same (to learn spanish) of someone who doesn't speak spanish and wants to go and live in my country.
When i first read the joke i thought it was funny until i got to the last part, then i thought it was a little rough. But after reading it again, i have to recognize that there is truth in it. I don't think there is racism in it, just an honest complain of a social situation. I understand that, in some situations, kids may not know the language and that leaving them without education would be bad for them and the society, but this cannot account for the majority of cases. To make things worse, even if the kid is leaning english in school, he/she goes back home and speaks spanish, watches spanish-spoken TV and listen music in spanish, this not only slows the learning process but also creates the idea that he/she doesn't need to learn english.
I have seen situations like the one fleurya described and it makes me angry, spanish is my original language and i like it, but this (the US) is not my country and i must respect it.