Here's the Spanish language version of the Great Seal of the United States of America, direct from usa.gov/gobiernousa (upper right hand corner). Usa.gov is the offical web site of the U.S.A. Their (our?) about page (usa.gov/About.shtml) says it's from the U.S. General Services Administration's Office of Citizen Services and Communications. It was started at the end of the Clinton regime, but I'd imagine the translation happened under Bush.

It's just a logo, right? Yet, it's things like this that could be the straw that breaks the camel's back.

The best way to fight things like this is to work to discredit anyone who supports massive immigration, especially of the illegal variety. Please go to campaign appearances and ask politicians tough questions designed to reveal the flaws in their immigration policies. Then, upload their response to video sharing sites and publicize it. Doing that enough times will have an impact on their careers, and that's the only message they can understand.