Open borders would be a disaster. Mexico is essentially a failed state with a population over 100 million. We would be swamped.
So what? Certainly the average well-being of (current) American citizens might decrease for some time, but at the same time the average well-being of those Mexicans that chose to immigrate would probably increase. And in the long run I suspect everyone would be considerably better off on average. In my book that's a positive outcome, which is why I would probably support it.
So if open borders aren't feasible, some type of restrictive immigration policy is. The immigration policy we have now isn't working. One of the options is to adopt a policy more in line with the rest of the industrialized world.
We do have an immigration policy that's in line with the rest of the world's. Our immigration policy is how many visas we grant, how well we patrol our borders, how well we check for immigration violations in the workforce, etc. Like all industrialized nations, we have a strict policy on paper, and (deliberately) do not enforce it in practice.
I've been to England. I didn't notice anything comparable to what I see in Southern California. Britain has a population of 51 million and a high end estimate of 900,000 illegal immigrants. About 1.7%. We have a population of around 300 million with 13 million illegals. About 4%. Our problems with illegals are more severe than Britain's.
England is a special case. It's an island, and it's just about the most difficult place to get in Europe for an illegal immigrant. Most illegal immigrants to Europe come across the sea to Spain or Italy or Greece, or by land into eastern Europe or Greece.
To give some numbers, a source I found said that Greece detained about 10,000 illegals a month in a recent year. That's the per-capita equivalent of the US detaining about 300,000 illegals a month.
Have you been to L.A. lately? How do you quantify "far worse"?
As for legal immigrants: the German chancellor, Angela Merkel, recently stated "Der Ansatz für Multikulti ist gescheitert, absolut gescheitert!" (multiculturalism has utterly failed). Can you imagine Obama saying something like that? He never would, because it's obviously not true here. In France there were very serious riots across the country (not just in one city), mainly involving legal immigrants and their children. While it's just a feeling, the sense I get from people there is that the situation is much more tense than it is in the US.
If they follow the law. Illegal immigrants are not American, probably don't feel American, and don't get a fair shot. This is as it should be. They are here illegally.
We're not talking about them, we're talking about babies born in the US.
How is not being granted automatic citizenship penalizing a child? I'm not proposing an ex post facto change. The children who have been born here continue to be citizens. Future children born here of illegals won't be citizens. That's not a legal penalty.
Two children, born on the same day in the same US hospital. As it stands now, all such children are automatically US citizens by constitutional right. As you would have it, that right will be obviated and the child penalized if its parents committed a certain, specific crime.
Now you might try to weasel that citizenship is not a right, it's a privilege - and so this isn't a penalty, it's the lack of a benefit. Should we then also deny citizenship to children born of convicted murderers? That's a vastly more serious crime than a visa violation, after all. What about future felons (since at the time of the child's birth, the immigration status of the parents is presumably not known to be illegal) - shall we remove citizenship from children with parents that are later convicted of a felony? And what about poor brown people? Odds are their kids are going to be poor and brown too, right?