The problem we find coming from the immigration situation is not from immigration itself, but from the related corruptions to our fed & state gov't's which feed it. Thomas Sowell or Frederich Bastiat or Walter E. Williams, and more, have given reams of examples and information on how one 'isolated' instance of tampering with the free market, ripples disruptions outward, which prompt compensatory actions which themselves cause more compensatory ripples to spread chaos even further.
To lift a few instances out of the mix at random, minimum wage law, health care rules, public schooling, social services... and on and on. These cause enough problems and conflicts within the regular citizenry, market & gov't interplay all of it's own. But worse, they also cause what should be a highly valued result of America being America - immigration, to be twisted into a visible focal point for each of these corruptions of our political structure to be displayed for us in harsh flashing neon.
There is nothing more valuable than people (the "Ultimate Resource") - qualified as people who do understand the value of liberty and freedom, seeking to come here and practice it in their lives. A non nanny state gov't, such as America predominantly was prior to the 20th century, was it's own immune system, drawing in only those willing to take a risk on their own skills and abilities to earn a livelihood and better the lives of their families. On the whole, immigration, on the melting pot plan - learn the language, learn the founders political philosophy, adopt the culture, work hard & get ahead - this was America's secret weapon from the founders time on, and on the basic principles, even from the 1600's and Jamestown, on.
All of the Nanny state, regulatory, gov't mandated policies and services that have been implemented, to mark a fuzzy line, from Teddy Roosevelt, from that time on, and amplified with the Warren Court decisions, have served to undermine and corrupt that lifeblood little by little, until now what should still be a supreme value for us, is a raging infection.
My personal view on immigration, in an uncorrupted gov't, would be to open the doors and welcome them in, only being sure to take their names, make sure they are not spreading disease, are not felon's, track and ensure that they are becoming good Americans, and on to the next issue. 911 modifies that to put a tighter, more in depth focus on the taking of names, background and tracking, finger printing, reporting in, etc, but the rest still holds.
It even holds for those from Mexico or Canada who want to come temporarily to earn some money and return home, again, with emphasis on the tracking and law abiding parts. There is only benefit for us and them - as long as the qualifiers are in place.
Anyone who flouts our laws should be unceremoniously given the boot, and never allowed back in. Period.
The difficulty we have now, is separating those coming here to take a risk on their own skills and abilities to earn a livelihood and better the lives of their families and so on, from those coming to take advantage of public schools, 'public' health care, welfare, etc.
The problem isn't immigration, that is only where the real problem is too visible to turn away from. The problem is that we have allowed progressive, socialist, postmodern, multiculturist 'ideas' to corrupt our system, and ourselves - until they are taken care of, neither the immigration or other problems are going to be taken care of.
Until we again have a free market, and a gov't governing within its proper bounds, we will not have an uncorrupted populace. To dream otherwise, is but to dream.
For the moment, I think that all we can hope for (probably vainly given the mushiness of our congress on the issue) is an effective background checking, identification and tracking system for immigrants. An insistence that they show proficiency in the language within x number of months, and that law abiding behavior be absolutely required, violation of which results in permanent expulsion. And as strict a monitoring of the borders as is feasible, and with unquestioned shoot to kill force being authorized for those patrolling it feel is necessary to their own protection, and jobs.
In short, if we see the issue with immigration being in conflict with our laws; when we are at root A Nation of Immigrants, and A Nation of Laws, then we need to look at the rippling set of laws that have prompted that split. If you do, I think you'll find that a great deal of the laws which were passed in the 20th century, are laws that must be passed away. Soon.