I could have told you that. Oh, wait: I did.

From William Eskridge and Hans Johnson, "Commentary on marriage grants: Marriage equality’s Cinderella moment" on SCOTUSblog:

The nation has arrived at this moment for marriage equality, essentially, because lesbian and gay couples came out of their closets. Once Americans got to know something about LGBT people and their relationships, the overwhelming anti-gay attitudes of thirty years ago have steadily eroded. When we were growing up, in the small-town South and Midwest, almost everyone said that “homosexuals” were mentally ill and dangerous predators. Indeed, the central anti-gay stereotype was (and remains) the idea that “homosexuality” is anti-family. This is the conceptual basis for the Clinton/Bush-era idea that marriage and family need “defending” against LGBT persons.

I predicted that in law school two decades ago, only to have an ACT UP higher-up give me a lecture on how completely wrong I was and on how that would never work.