From this collection of photos from GLBT Pride Parades, San Francisco, 1977-78.
I did some research on the text of the signs in this image. Here’s something from Wikipedia:
Save Our Children, Inc. was a political coalition formed in 1977 in Miami, Florida, U.S. to overturn a recently legislated county ordinance that banned discrimination in areas of housing, employment, and public accommodation based on sexual orientation. The coalition was publicly headed by celebrity singer Anita Bryant, who claimed the ordinance discriminated against her right to teach her children biblical morality. It was a well-organized campaign that initiated a bitter political fight between unprepared gay activists and highly motivated Christian fundamentalists. When the repeal of the ordinance went to a vote, it attracted the largest response of any special election in Dade County’s history, passing by 70%.
Save Our Children was the first organized opposition to the gay rights movement, whose beginnings were traced to the Stonewall riots in 1969. The defeat of the ordinance encouraged groups in other cities to attempt to overturn similar laws. In the next year voters in St. Paul, Minnesota, Wichita, Kansas, and Eugene, Oregon overturned ordinances in those cities, sharing many of the same campaign strategies that were used in Miami.