Also, the article you linked to about how uncontrolled immigration is such a great thing is written by a Leftist activist. He's also someone who recently mobilied on behalf of Muslim students who shouted down the Israeli ambassador- an invited guest speaker at UC Irvine- so severely that he couldn't say a word. The Muslim students were charged with a misdemeanor.
(UC Irvine being that bastion of Centrist political views)
http://latimesblogs.latimes.com/lanow/2011/02/uc-irvine-muslim-students-charged.html
Let me enroll in his class, stand up and shout him down incessantly with some bearded Tea Party people, to the point where he cannot even say a single word, and see if he's understanding and compassionate as we interfere with his free speech. Something tells me I'd be escorted out of the building by law enforcement or campus police.
That has what to do with assimilation? The point of the article is to demonstrate the length of time it takes to assimilate into a culture. Migration Policy Institute as a source is one I am confident in posting.
Nowhere in that article does it say "uncontrolled immigration is such a great thing." But the guy who wrote it is a what I would consider an expert:
"Author or editor of more than 150 scholarly articles and chapters and 18 books, Bean's research focuses on international migration, unauthorized migration, U.S. immigration policy, and the demography of the U.S. Hispanic population. A member of the
Council on Foreign Relations, he has been a Guggenheim Fellow
[2] and held numerous visiting scholar positions (at the Russell Sage Foundation, the Transatlantic Academy, the American Academy in Berlin, the Research School of Social Sciences at the Australian National University, and the Center for U.S./Mexico Studies at the University of California at San Diego). He has mentored dozens of students, who hold (or have held) positions at such places as Georgetown University, UCLA, the University of Illinois, the University of Pennsylvania, Pennsylvania State University, Princeton University, the University of Washington, the Migration Policy Institute, and the U.S. Bureau of the Census. A frequent recipient of foundation and federal grants, Bean has been a Principal Investigator of NICHD behavioral science grants in population in every decade since the inception of the program in 1969. In 2011, he received the Distinguished Lifetime Scholarly Career Award in International Migration at the annual meeting of the American Sociological Association"
"He co-directed a large research program at The Urban Institute and Rand Corporation on the implementation and effectiveness of the 1986
Immigration Reform and Control Act (IRCA), legislation that initiated employer penalties for hiring unauthorized workers and permitted legalization of unauthorized immigrants in the country. His research involved developing estimates of how IRCA affected unauthorized migration and what factors affected flows from Mexico.
[5] In the mid-1990s, he led a group of U.S. and Mexican scholars seeking to improve estimates of unauthorized migration for the Mexico/U.S. Binational Migration Study, mandated by the U.S. Commission on Immigration Reform.
[6] The research provided what The New York Times called in a front-page story "the first authoritative estimate of the net annual flow of illegal Mexican workers into the United States."
[7] This work also helped to spawn adjustments for coverage error in all subsequent official and widely accepted estimates of unauthorized migration."
I think he is qualified to speak about assimilation and migration. In your link his name is not mentioned. Strange that I didn't see any links to liberal activism in any of his works or summaries of his work.