Nope. I haven't told anyone to go back to their country. Neither have my friends, family, teachers and lecturers and pretty much everyone else I've ever encountered in Europe. Don't generalize. Besides, if I were to go back to my country, I'd be going back to South Africa. I'm sure if these guys returned to their country, they'd stick in Jamaica.
Just because you haven't heard someone say something doesn't mean it hasn't been said