I like how the blatant racism still shown against blacks and (less so) hispanics can be equated to not allowing gays to get married.
The word miscegenation entered the language in the Southern USA. For a century, it was common for white southern advocates of the social status-quo to accuse advocates of the elimination of slavery, and later the advocates of civil rights for African Americans, of actually having the goal of miscegenation and the "destruction of the white race."...After World War II, many white southerners accused the US civil rights movement of Martin Luther King of being a Communist plot funded by the U.S.S.R. in order to destroy the United States through miscegenation.
In most of the southern states, various laws were passed making it illegal for members of different races to marry; these were known as miscegenation laws, like the South African Immorality Act. Interracial marriage was prohibited by state laws, the constitutonality of which was upheld by the U.S. Supreme Court in "Pace v. Alabama" (1883). That decision was not overturned until the United States Supreme Court ruled in "Loving v. Virginia" (1967). At that time, 16 states still had laws prohibiting interracial marriage.