there is nothing wrong with diversity so long as you do not lose yourself to it
this statement:
"What we shouldn't do is to say that they [immigrants] should be more like us. We should construct a new us."
is the exact thing I am referring to here, a country, or any culture needs to have some backbone to it, it needs confidence in it's self to survive and compete with the other cultures of the world. a culture that basically has no respect for itself, is not going to be able to survive, as soon as it encounters a strong willed self confident culture it's doomed, the other culture will assert itself and take over. there is a reason why no _*NO*_ culture lacks ethnocentrism, it's a cultural immune system, without this no culture would be able to survive in the presence of another.
now this said, there is strength in diversity, a diverse culture can adapt faster and can, without effort, survive things a xenophobic introverted culture would be wiped out by in an instant. but for the love of god people, there is a happy medium, have some pride in yourself, in your nation, look at the great things your people have done and realize that it was your culture that did that not the people to the north, not the people to the south, you and your kind, something about the way you do things allowed this, and you should be hesitant to change it so radically, and opposed to adopting someone else's way of life. I mean hell if your culture is not worth following then you might as well move to somewhere that is, and if someone else moves to were you live they should try to fit in as well