It is nothing short of astonishing that Arizona Gov. Jan Brewer Friday signed a bill that could make it dangerous just to look Hispanic. That's not the purpose of the new law, of course. As The Post reported, the law "requires authorities in Arizona to question people about their immigration status if there is reason to suspect they are in the country illegally." The Arizona Republic notes that it "would require anyone whom police suspect of being in the country illegally to produce "an alien registration document,' such as a green card or other proof of citizenship, such as a passport or Arizona driver's license."