... makes English the "official" language.

If English is the only "official" language then it's the only language by authority; authorized to be used or authoratative and formally being set or prescribed by law... and, yes... I agree that if José gets caught speaking Spanish in public he will not be shot, but what will prevent José from missing out on what may be very important to him if he either doesn't have the command of the English language or not able to fully comprehend important text if he's told: "Sorry, José, if you want to know what that law is or what that legal document says, you're going to have to learn English like the rest of us and it's not going to be translated for you because English is the only language in the USA, by law...!"

Granted, that it's required to know in order to become an American citizen, but why make only the English language official if Spanish is the second largest spoken language here in the USA...?

English is an official language in several countries... though it is not solely the official language in those countries.

We have nothing to worry about; English will never, ever be the only official language of the United States of America... no matter how much some moan about why it should.

JB