So let's look at this issue. Let's get the flag-waving statists who use their patriotism to cover their ignorance out of the way and get down to the meat of the matter.
Immigration has been the backbone of this country since its founding. Now all of a sudden we hear cries of "Close the border!" and all of this other nonsense. Illegal Immigration is a problem in one and only one aspect and that is the aspect of the welfare state. (Those of you that know me, know that I absolutely loathe the welfare state, it creates perverse incentives, rewards lack of productivity, and creates an entitlement mindset.)
So let's look at this immigration deal. These people come to the US for a better lifestyle than is offered in Mexico, They work low-income jobs which many Americans would not work and here's an interesting fact from the 2005 Census Bureau: Nearly one-quarter of all hispanics marry non-hispanic spouses. The number get's higher for those born in the US. Roughly 32% of all US-born hispanics marry non-hispanics, and 35% of all college educated hispanic females mary non-hispanic husbands. So .... apparently they assimilate pretty damn well.
So the argument that they don't assimilate well into american culture is just WRONG.
Next is the argument that they are "taking" American jobs. Allow me to explain, there is no "right" to your job. So first off if someone wants to underbid you for your job, that's just the way things work. You have to be willing to negotiate and haggle to keep what you have.
Second, it seems very odd to say this. 99.99% of first gen hispanics don't come to this country to work in high skill jobs. They are working in low-skill labor markets which by the way, is a very easy market to enter and exit (well except for minimum wage, which we won't get into here.)
Third there is the argument that the increase in immigration = more of a terror threat.
Here's an interesting thing... Immigrants are less likely to commit a crime than naturalized citizens... wait for it .... Yep that argument from the idea of crime is nonsense. ANd on a side if the Immigration service can't tell a difference between Achmed and Juan, we gotta a whole different set of problems.
The biggest problem people have is immigrants drawing benefits from the welfare system, but that is merely a symptom of the disease. So if we didnt have a welfare state, this wouldn't be a problem.