Like when you look at the roster of a sports team, what looks good on paper, and those in charge say that it is good, the reality is often very different.
To find out how the law is really working, you need to talk to those that actually have to enforce it. All of a sudden, you might find that the law isn't what it would seem to be:
Today, Cuentame — a project of Brave New Films — posted a video interview with Phoenix police officer Paul Dobson’s reaction to Arizona’s new immigration law, SB-1070. Though the Phoenix Law Enforcement Association (the union representing Phoenix officers) “lobbied aggressively for the law,” not all of its members think it’s a good idea. In Cuentame’s video, Dobson expresses his own opposition to the law and how he believes it will affect his ability to fulfill his duties:
This [SB-1070] law will make me feel like a Nazi out there. [...] How I feel about SB-1070 is I have a great deal of contempt for it, I am very emotional about it. This law is pure and simple a racist law. It is focused on Latinos. I would not be able to show any discretion whatsoever under SB-1070. I am required to arrest that person and take them to jail. As a law enforcement officer I am required to serve and protect. Under SB-1070, I know that people will not call officers in case of a real emergency. [...] It violates our calling to serve and protect.
Of course, a police state for anyone who is not an older, white conservative is one of the main planks of any good conservative's platform, even if they were against it before they were for it.