Many past students of mine complain about their instructors in college being foreign. I had the impression that the professor for the class was doing research and put a bright, teaching assistant in charge of the class. I was wrong.
There are many more graduate students from foreign countries than the US. Since teaching positions at the universities are filled by doctorates, it only makes sense that the supply of professors has increased as more qualified, foreign-born workers are hired by the universities. In the near future, you will find that 2/3 of the instructors were born in India, China, Japan, France, Germany, the Middle East, and Scandinavia. You will also find that the majority of the students are US born. Perhaps it will be a strange irony that foreign nationals will be teaching traditionally American subjects. At least, US students will learn that hard work and not bequests are the way to life's fulfillment.
A kind of related note that many of our high school students are taught about the US Constitution by a Kosovo immigrant.