Don't have a right to be here? Some of the people you talk of aren't here, many have a right to be here because your governement give them visa. Many Nigerians when they travel to Europe and America feel free to criticise the peoples the governement and anything they like - that's freedom of speech, non? It's all too typical of many Nigerians to over-react just as you are doing now.
I too am born in Africa, Angola of French father married to Haitian/Senegal/German mother, so I have every right to be here. Why do you think ICAO is here in Nigeria now? Is because so many Americans want to come to Nigeria? How many Nigerians do you see catching flight to America compared with Americans coming this way. Governements sources say that in 2002 more than 139,500 Nigerians immigrated to USA. Houston is estimate to have 80,000 Nigerians. Uk governement estimates more than 800,000 Nigerians are living in UK, but only 4,000 Brits are living in Nigeria. Numbers of Nigerians are increasing in America and UK, but numbers of Americans and Britishs are decreasing because of increasing violence in Nigeria. Open your eyes to the facts. Much of international travel on which jobs are depending is because Nigerians want to leave and Nigerians who have left come here just to visit. Even your last President appealed to Nigerians to return because of this brain drain, especially of professional peoples such as doctors, engineers and nurses. Making veiled threats and childish gestures like Balewa talks on his thread only help to reinforce outsider views of too many Nigerians. You can't deny the problems there and it is only when you accept them that things will get better - why do you think you have EFCC there? A man just ask of corruption in Lagos - well it exists. Maybe it has got better but is still there and not just in background. When everyone is prepared to open his eye and act on this, when people in your country are ready to act against these crroks, not just talk of them and accept them, things will change for the better. That is the way to progress, not issue threats against people exercising their privilege of Liberté, Égalité, Fraternité, ou la Mort!