To capture all variety of the relations arising between local population and visitors, and also specificity of relations in neogenic diasporas it is not obviously possible. We will stop only on the most remarkable cases.
In 2000 the State department has accused the government of Cuba that it interferes with legal migration of Cubans in the USA. According to one of officials , even those Cubans who have the American visa on hands, cannot receive the exit visa. "It forces people to float by fragile boats through the waters teeming with sharks