Perspective

When a white, especially English speaking person decides to live in another country (usually a hot one), they are pleasantly referred to as Ex-Pats (at the very least, they should be called sun-migrants). And though, they might, to a degree, annoy the locals are generally accepted. 

Everyone else who packs up and moves to another country, especially those of darker hues, are referred to as migrants, immigrants and refugees, classifications that create immediate visions of job stealing, system abusing, terror inducing, thieving, uneducated, dangerous people. People who will arrive in hordes upon hordes, if you let them.