As with most issues, there needs to be a balance. In every generation, resistance to immigration of all kinds has come in part from fear of various undesirable others, and I don’t think this generation is any different. That being said, there are legitimate reasons to limit the number of immigrants, especially the number of immigrants likely to need financial support.
There’s a difference between “not assimilating” in the sense of preserving traditional foods, dress, etc, which add to the tapestry of an American culture that has never been monolithic, and “not assimilating” in the sense of fundamentally closing oneself off from the capacity for meaningful participation in American civic and communal life, which is what happens if you don’t make an effort to become reasonably fluent in English. That being said; I’m simply not sure if that is any more of an issue today than it was in past waves of immigration. I know several of my great-grandparents never really learned more than elementary level English, probably because they were working so hard to support their families that taking the time and effort to learn a new language as an adult wasn’t an option. All of my grandparents, who spent most of their childhoods in America, still managed to become fully integrated in American life. I suspect this is a common story, then and now.
I do think there’s a more fundamental problem – more evident in Europe than here – with immigrant populations who are unwilling to embrace certain core values of (small “l”) liberalism. Religious zealotry, oppression of women, and extremely retrograde sexual mores are a very different matter from introducing burritos or samosas to the 4th of July BBQ. That doesn’t mean banning immigration for people of a certain race or religion, especially when those people are facing dire and even deadly conditions in their home countries, but it does mean proceeding with some caution. The same goes for the problem of bringing in gang violence or members of the drug trade – certain elements may overemphasize these risks as scare tactics, but that doesn’t mean there isn’t a real threat.
As for illegal immigration, I think we do have an obligation to be as compassionate as we can, short of national suicide. Deporting a child who had no say in whether or not he or she was brought to this country is cruel. Deporting a parent with no criminal record is cruel, and counterproductive if we don’t want her citizen children to become a burden on society. We do have the means to absorb a number of these people, and lack the ability to deport all of them in any case, so deporting otherwise law-abiding and long-time members of society with ties to this country as a merely punitive action is not only heartless but almost certainly bad public policy. We can work to shore up border security and decrease incentives for immigration to limit future immigration and focus on targeting dangerous immigrants while absorbing a lot of the most sympathetic cases. I simply can’t get behind the idea that we need to punish people who came to this country illegally out of desperation. There but for the grace of God go I. There but for the grace of a relatively tolerant legal immigration policy would have gone my ancestors, and not so long ago.
I’ve traced my genealogy pretty extensively. A lot of my family lines end in the death camps. I take seriously the value of helping the suffering and desperate, even as I recognize that practical concerns must temper our compassion.