With the official unemployment rate at almost 10% and unofficial ( and likely more accurate) estimates even higher, the very last thing the US needs is more imported workers, skilled or not. The bishop cannot be unaware of this. But as usual, he blames America for the unlawful actions of others. If foreigners break our laws, it is because our laws are unjust. You see, America is always to blame. by this reasoning, if I steal my neighbors car, it's his fault for not giving me money to buy one of my own.
I do wonder how much that demand would still remain if the workers became legal workers.