Re your post:
Fair enough re: item 1--we're talking about two different populations: illegal ag workers, and illegal non-ag workers. The latter being much, much more likely to commit a crime. But maybe you're right and we should look at the illegal pop as a whole.
re 2 & 3--I'm not encouraging massive illegal immigration, I'm stating that if America does not keep up in the population race we are going to lose are number one super-power status to China or India.
By 2040 w/o stepped up immigration (and not taking into account illegal immigration)
-SS will go broke, because not enough people working to pay for the retired.
-Millions of Jobs will go unfilled because of lack of workers.
-China will overtake the US as the number one super-power because of #1 & #2.
I think a damn good case can be made that, without the good ol' underpopulated USA, China and India would forever wallow in poverty, let alone ever aspire to superpower status.
I also thought it beyond debate that the secret of the US's success is our system of government, the apogee of western liberalism (the traditional kind), based as it is in faith in the Almighty.