I came to the United States as a boy. I love America, and I love the country from which I came. Those loyalties are not mutually exclusive. A person can retain affection for the culture, history, family, and landscape of one country while accepting a genuine civic obligation to another. But that second commitment must mean something. To become an American citizen is not merely to acquire a passport, secure economic opportunity, or gain the ability to come and go more easily. It is to enter a constitutional order and assume responsibility for its continuation. That distinction matters because many people are attracted to the outcomes America produces without understanding the system that produces them. They see opportunity, mobility, relative security, educational access, commercial possibility, and the capacity for reinvention. They may not see the constitutional restraints, cultural expectations, institutional arrangements, and inherited civic habits that made those opportunities possible. The asset is visible. The system behind the asset is not.
Orin France (Sun,) studied this question.