s have gained equality and gays and their heteroual supporters now outnumber those opposed to ...?

Honestly I don't know about being outnumbered quite yet. If marriage equality is still being voted down, that says something about our society. But even if political and educational efforts don't go anywhere, I think we're at the tipping point as the new generation grows up and the old one dies out. There will always be someone wishing that the world would stop moving on without them.