Great article on immigration by Michael Kinsley. Here's my favorite part:
The suspicion naturally arises that the illegality is not what bothers you. What bothers you is the immigration. There is an easy way to test this. Reducing illegal immigration is hard, but increasing legal immigration would be easy. If your view is that legal immigration is good and illegal immigration is bad, how about increasing legal immigration? How about doubling it? Any takers? So in the end, this is not really a debate about illegal immigration. This is a debate about immigration.