To quote from that site: "Polls consistently confirm that most Americans want stronger gun laws."
Or for a bit larger quote from them: "One of our first projects was to mobilize the Bay Area legal community to support enactment of the 1994 federal assault weapon ban. We then concentrated our efforts on California, providing legal assistance to California communities seeking to adopt and defend local gun regulations. Our services contributed to the adoption of hundreds of California firearms ordinances, many of which inspired state legislation that now places California at the forefront of gun policy reform."
Thanks for mentioning them though, I'll make it a point to keep an eye on them, and fight it if they try to move into my state.