You have to ask. Why? The way I see it they are breeding like crazy and I do not see the backlash that we all heard about via the Islamic migrants. Honestly I do not care, let them come.
Point being why not just pass a law about who is who because honestly the way I see it is still racism to be like "Thank gosh it is not anybody from Africas" or some bs like that.
Another way to see this as a problem is the possible corruption, or the sheep in wolves clothing, or what this could mean for voting power or activities.
Look at Australlia