When black people wanted to be able to sit anywhere on the bus, the white people around them were just sure that it was the first sign of total social destruction. They were convinced that the next thing these blacks would want would be to be allowed to vote, and then to elect black people to public office! And to the white's way of thinking, this would spell the end of their 'way of life' as they'd always known it.
And they were right. Black people did demand more than just to sit wherever they wanted on the bus. They did demand the right to vote. And they did elect black people into public office. And they did put an end to life as it had been, before. But it turned out that the changes weren't so dower for white people after all, and they made life a lot better for a whole lot of other people who had been suffering, before. So it wasn't such a bad thing after all.
Homosexuals are already on the march. They already can go wherever they want to in our society, and they can already vote, and they have already elected many fellow homosexuals into public office, and life as it had been is already changing. Sorry, dude, but you're going to have to accept it. Just as the racists of decades past had to accept desegregation and the abolition of the 'Jim Crow' laws.
But just as before, the world is not going to fall apart. Although it will not be the same, either. But a lot of people who had been made to suffer in the past, will no longer have to suffer as they once did, and the people who were responsible for that suffering will not be significantly harmed by the changes. All our crying and whining and visions of doom will once again prove to be mostly internalized fear, as we're forced to accept the changes happening around us.
I'm not black, but I'm glad for all those changes that happened a few decades ago, because I don't want to be part of a white oppressor class/race. And I'm not gay, either, but I'll be glad when homosexuals finally have all the same rights as everyone else, for the same reason. I don't like to see other people suffer, and I especially don't want them to suffer for my sake. Especially when ending that suffering doesn't really hurt me, or anyone else.