No, you just failed to comprehend what you are reading. Where did I say 6 million was too many? I'll give you a hint: nowhere. I did the math before posting it, obviously. I threw 2% growth out there as a target because it represents a high-water mark for American growth in the modern era. I also said:
Now if the only way to get 6 million (immigrants + natural growth) is to import all low-skilled labor, then no, we wouldn't do that. Your nonsense about 6 million brain surgeons shows how you are not being a good-faith participant in the conversation. The world is not comprised of only poor Mexicans and brain surgeons.
As I said:
The balance of our population is equally important to it's growth. If growth was the only factor that mattered, South America and Africa wouldn't be a dumpster fire. I'd rather not adopt that model, thanks.
Most likely the late 90's, when communication technology allowed immigrants to focus their efforts on reaching very specific locations where there were high densities of immigrants from their homelands. You also have a huge shift away from geographic growth, where decades ago the construction of the interstate highways moved millions of people to new parts of the country, and the immigrants were often the first to move. Now they are concentrating in major population centers or states where they have high density, such as the Somalis in Minnesota. So yeah, once again, things change. Adapt or die.
And once again, when the Asians you reference came a hundred years ago there was a tremendous need for physical labor, such as building the railroads. Pretty much all construction was done with manual labor back then. Didn't need an education, and you didn't need to speak English.
Yes, as compared to the high-school dropout native who will have a negative net impact. Could it be that employing immigrants for highschool-dropout-jobs is reducing the demand for highschool-dropout-natives? Obviously it is, by the tens of millions. That study shows how expensive the uneducated native population is becoming, because they aren't working. Interestingly, it also shows that the financial benefit expires after the first generation of immigrant. Their kids become a negative proposition. We can have a conversation about eliminating most Welfare programs for everyone, which I support, but it's a different topic.
We can't just get rid of our unskilled native-born citizens. Redirecting their potential employment to cheaper, illegal (or legal) immigrants only makes the problem worse.