There are clues in skin colour, language, behaviour, that different types of people are possibly not going to get on?
I have seen invasions of "Romany Gypsies" onto Mitcham Common. What you get is piles of rubbish, no-go areas, and HUMAN EXCREMENT in the bushes. These people are not to be treated as citizens while they insult the societies they infest.
I may be wrong, but at a guess, these people fall into this broad category. In which case, if they return to Romania, good job too, and the sooner the better.