Well, firstly, you've admitted it yourself, there, AS. Yet, despite your statement, you seem content to recite assumptions as truth. I don't mean to be disrespectful but is it not so?
You have to be very careful when bandying about such terms as: 'In the majority of cases' or the like. On forums such as this, such loose, unanalytical statements are so often just thrown out there.
On a lighter note, it does make me laugh when I hear people who have upped sticks and moved to Spain, for instance, saying they left Britain because of all the immigrants. The conversation will be along he lines of:
'They come over here. They don't integrate, only mix with each other, only eat their own food, fly their own flags, don't bother to learn our language.'
So they emigrate to Spain where they only mix with ex-pats, only eat English food, never learn Spanish and fly a Union flag (or St George) in their front porches.
Does make me chuckle.