At churches, shopping centers, schools, and local tea party meetings in California, fired-up volunteers have started gathering signatures for a ballot referendum that would repeal the nation’s first law requiring public schools to include prominent gay people and gay rights’ milestones in school lessons, the Associated Press reports. Organizers of the Stop SB48 campaign—Senate Bill 48 was the law approved by the California Legislature and signed by Gov. Jerry Brown in Jul —are telling would-be voters the new mandate would inappropriately expose young children to sex, infringe on parental rights and silence religion-based criticisms of homosexuality…