Monolingualism vs Bilingualism

A family that my parents are close friends with are from Peru, and they taught their son both English and Spanish when he was young. He now speaks both very well. Though his father, who began learning English much later in his life, still struggles to master the English language. I think that the strict "English only" advocates that our text talks about are short changing our youth by thinking that they will become confused and end up being monolingual in the long run away. Perhaps more of these people should look into taking a human development course so that they could get a better idea for how crucial this time in a child's life is for language learning. Of course, I think there are other factors at play for these kind of "English only" advocates, but if their concerns really were simply the potential confusion of the child, it seems that they are thinking a bit egocentrically in placing a child who is just learning language development into their personal situations. As adults, it is certainly difficult to learn new languages. However, it doesn't seem that a young child's capability to speak multiple languages is as rigid as an adult's is. I think that there needs to be more awareness in our society about this, so that we can push for better multilingual programs for our youth.