Many posters are raising the issue of keeping illegal immigrants, violent criminals or not, out of the U.S., so I have to ask: Do you truly believe that's possible, given the long border with Mexico, and the huge Atlantic and Pacific coastlines? What countries, other than perhaps North Korea or Cuba, don't have trouble with illegal migration?
Do you propose building an almost unsurmountable wall or fence, with attack dogs, land mines, armed guards ordered to shoot on sight? Such a structure divided Europe for decades, was designed to keep people confined to eastern Europe, was called the Iron Curtain, and didn't prevent all escapes. Some people still manage to escape from the horrors of North Korea, with its strong dictatorial regime.
Supposing a fail-safe barrier could be erected: How could it be financed? Are you willing to pay much, much higher taxes, and the "social/political price" of Draconian measures, to keep people out?
I really see the point of enforcing laws to prevent employers from hiring undocumented aliens, and of deporting those caught, but find some of the reactions to illegal immigrants somewhat unrealistic. If you're against an amnesty, so be it, but are you really willing to pay all the costs involved? Are you willing to go through the red tape and costs involved in issuing every U.S. citizen and legal alien a biometric national ID, as that will be necessary? And of submitting to ID checks everywhere?
Is it worth it? If there are an estimated 12 million illegal immigrants in the U.S., and an estimated 300 million inhabitants, that works out to what, 4% of the inhabitants?