Actually, a lot of Christian schools are very intolerant of others who oppose their view.
Then about bilingual ridicule, You need to look no further than GW Bush who ridiculed John Kerry because he spoke French. Many of his supporters thus adopted that view.

A lot of Americans state that they don't need to learn another language, that everyone should speak American, even though they think that what they speak is English. They even demand it when they go to a foreign country. Islam, now that is another story. If they only read their own Quran they would have an awakening. Problem is that many people who follow Islam cannot read or write in their own language. They are told what is in their book, therefore outfits such as Isis and its ilk arise.
School vouchers equal the dumbing down of America.