It is sad to observe, but the current increased acceptance of homosexuality and other alternative life modes might be just a swing of a pendulum. Homosexuality flourished in pre-Nazi Germany, but was repressed by the Nazi and post-war governments. Conditions are better now, but all it will take is a crisis for which the LGBT community is a convenient scapegoat to push the community down again.
I don't see the US as being much different. People respond to emotion more than logic and if a sufficiently nasty scandal comes along it could be devastating.
