I don't know how you meant that, but this is absolutely the case in every European country that I know of.
You are considered one of them if you have the appropriate skin color, name, accent, etc. This is so deeply ingrained in the human psyche that it's nuts to even fight it. It will only change when a large enough part of the population will have the "wrong" skin color, name or accent. Or you get large scale open conflicts, I guess, there's no guarantees of a happy end, on the contrary.
You are considered one of them if you have the appropriate skin color, name, accent, etc. This is so deeply ingrained in the human psyche that it's nuts to even fight it. It will only change when a large enough part of the population will have the "wrong" skin color, name or accent. Or you get large scale open conflicts, I guess, there's no guarantees of a happy end, on the contrary.