Immigrants deprive nationals of jobs and increase unemployment and social security costs.
Following Hungarians, German descendants in Romania used to be the largest minority in the country. After opening the borders, and due to the repatriation immigration policy of Germany, their number drastically decreased. This migration did not invoke bold headlines, though, because these people were much less visible. Another sorts of migration are those that follow wars, collapsed economy systems and international conflicts (see recent examples of Rwanda, Sudan, Kosovo) or natural catastrophes, like the renewed volcanic activity on the island of Montserrat that resulted in a feverish evacuation of most of the inhabitants.