Your thought experiment actually assumes a different planet, to present the case you hypothesise about. Why not come up with the scenario of a country where all men are rapists? So how many legs and eyes do these "men" have? And did they announce, when they arrived "Take me to your leader"? Based on some shocking cases in the press, it seems that many British expatriates, and probably tourists, are either paedophiles or bank robbers/drug dealers on the run. Ergo, Britain is a nation full of paedophiles, drug dealers, drug addicts and bank robbers. The solution is to stop all tourism in Thailand, because just because someone says they are Swedish, how do we know they are just lying. Americans and Canadians speak the same language, so they also must be a nation full of paedophiles. You are attempting a Straw Man. It's not the place. Try another tack to make your point.