Prince the part you're not seeing, or more likely refusing to see, is that AZ is simply doing with the FED is supposed to do, but isn't. IIRC correctly, ever since the Southern border of CA put up some barriers and walls, illegal immigrants have been gushing into AZ, with its easier to access border. AZ now leads the nation in apparent kidnappings, and has I believe even more "sanctuary towns" then even CA, where illegal immigrants can largely run drug running, kidnappings, and gang activity, as long as they don't get caught doing any of those.
Now, AZ has always had laws to stop people for infractions, and if suspician warrants such, determine the immigration status of an individual, and this "new" law simply gives the SAME # law enforcement (read NOT more), the support of the state in enforcing EXISTING immigration law. (read NOT new immigration law)
I tell yas, it really is interesting watching the near hysterics some folks are having at AZ daring to do something about ILLEGAL immigration. Gads, how dare they enforce the law. Those nazis