Why do the islands of the caribbean sea have so many different cultures

The cultures of the Caribbean countries are a blend of colonial mainstays and pervasive influences by major ethnic groups of the region such as East Indians and Africans. ... The U.S. Virgin Islands, purchased from the Dutch in 1917, mainly have an American feel with a few lingering elements of Dutch culture.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "