French used the be the official language in Louisiana but I have yet to meet anyone from there who doesn't speak English and they don't complain.
It's a little different when you live here. You obviously have never met Cajuns or been in Cajun country. There they do speak French, well, not France French, Cajun French. Oh, they'll speak English if they know it but you'd be better off learning some Cajun French so you can understand them. Their accents are a little hard to understand if you don't. But many have no urge to speak English and it's only taught in schools but not spoken, esp at home. Why should they when everyone around them speaks French?
Same thing living here in the city. You'd be out of the loop if you don't know at least a smattering of French. Nothing too difficult to learn really. But it's a culture thing more than anything else. I don't see a problem with learning what others speak in their Culture. There are three distinct forms of French in our area, Cajun, Napoleonic French and Colonial or Plantation French. You'd better know some of them if you want to travel within this State.
Not to mention it's difficult to live here without knowing at least how to pronounce some French if you want to order food, find a street or converse with long time residents in certain areas. And they make no apologies about laughing at you if you don't know them. They can be a bit rude about it really. They expect you to learn it if you live here.
I don't see a huge barrage of folks saying we should change. I doubt it would be met with Oh, of course we should, let's get right on that! rofl.
We have a ton of Mexicans living here now, they are rebuilding New Orleans. I just had a crew working on my roof. They didn't speak very much English, and I speak less Spanish, but I found it rather easy to communicate with them. They have fit in rather well here on the whole.
I wonder why they seem to fit in well in some areas and not in others? And why the backlash against this particular group of people when we have folks in our own country that don't speak English, nor are they expected to?