For hundreds (or even thousands) of years our population has been made up from people from various European countries, and many from further afield. There is nothing new here, and nothing wrong here. There should be no barriers between people in my opinion. Otherwise you perpetuate an "us and them" situation, which is inherently racist. Our country has always been, and hopefully always will be, multicultural and cosmopolitan. Population on our continent is mobile, and this needs to be accepted.