Immigration is very important for all countries, but assimilation takes time. (If you believe in the country enough to want to immigrate there, then the existing culture must have some value.)
Ask Syria, Iraq or South Sudan, how they are enjoying their open borders. Meanwhile, Iceland, Japan and other countries are doing fine. Arguably, they could be richer if they allowed in more immigrants, but I'll take the rule of law over the chaos of uncontrolled borders.
Meh, as a visible minority I'd rather the open borders than the opposite. The Nordic countries, Japan, and others with historically xenophobic and anti-immigration attitudes have a "stronger" rule of law, and the illusion of fewer social ills, because they don't have to deal with the discomfort of a heterogeneous population.
And now that immigration is increasing in these places the amount of racism being exposed is shocking, even when compared to the USA where racism has been front-and-center for decades. Hell, just look at HN threads whenever Muslim immigration to Sweden/Norway comes up, it's like Stormfront on steroids.
Your argument has been levied against just about every immigrant population that's made its way into the US. The Irish, the Italians, the Jews, the Chinese, all of whom were subject to enormous racist and xenophobic backlash, much of it under the guise of some vague notion of cultural integrity.
All of the above populations have integrated into American society and in fact the US would be markedly poorer - economically and culturally - without them now.
There's a small amount of schadenfruede I feel when I look at the struggles going on right now in previously-closed countries as they experience large-scale immigration for the first time. For years they tsk'ed tsk'ed at the US (and Canada) for their social upheaval, as people came to grips with living in a heterogeneous society, and criticized us for the many examples of blatant racism and xenophobia. Now that they're going through the same thing it makes me sad to see people from these very countries spouting the same justifications and views as Jim Crow-era America, as if they've learned literally nothing for themselves while observing us in judgment this whole time.
Was it a love for Native American culture that caused the original European settlers to come to the US? No, it was raw opportunity. Unless you're talking about Native American culture, then ALL culture in the US was constructed by immigrants.
Even Native Americans were immigrants as they crossed the Bering land bridge ;)
Actually, American Indian culture had developed a way of life that preserved a beautiful land in a sustainable manner, while much of the world was embroiled in war, feudalism and disease. True, there were inter-tribe rivalries as well, but the land was relatively peaceful and undeveloped compared to what Europe was experiencing with the Seven Years War, Protestant-Catholic Wars and massive civil wars at the time. I don't think the early Europeans necessarily understood Amerindian culture, but they were definitely the beneficiaries of it. If American Indians had executed a more cogent immigration policy, the transition to a modern economy would probably have been easier for the natives.
Of course, much has changed since then -- with finite resources like fresh water and land in good climates being consumed in many attractive countries.
Ask Syria, Iraq or South Sudan, how they are enjoying their open borders. Meanwhile, Iceland, Japan and other countries are doing fine. Arguably, they could be richer if they allowed in more immigrants, but I'll take the rule of law over the chaos of uncontrolled borders.