I don't know that America is 50 years behind. Pockets of it, maybe, but not as a whole.
Been teaching since 72. Had openly gay women in my class from 75, for several years. Not common back then, but nobody really cared. all we cared was they kept their hands up. Have friends who are gay. (Have some friends who don't know they're gay). Have friends who have children who are gay. My nephew is gay. Nobody really gives a damn.
My first landlord in Hawaii in 94 was named Lesbian Love. That was her legal name, on her drivers license. Her girlfriend, Ardie, had one of the nicest goatees I've seen to this day. (I still have beard jealously.) Both were hot tickets. They didn't care that my wife and I were straight and we didn't care they were gay.
But I'll tell you what irritates me a little. When a group, any group, goes over the top in a socially aggressive way to continuously declare, repeatedly - that they have brown hair - or whatever, and now your going to hear them roar. Or an individual, Like Ellen Degeneres when she first came out. And even though she was completely accepted, she just wouldn't stop roaring. We get it kid, you're gay. More power to you, we don't judge you, just do the damn show and shut up already.