I have a friend who got married this year, in England. It's nice to see things change for the better. I was in Hawaii when it was legalized (again, kinda) there, and working on a dinner cruise that did weddings. Within the week we had a lesbian couple have a wedding - they had been together for a long time, if I remember, and she was just like, "well, I kinda felt like it was time, and they just made it legal so why not have a Hawaiian wedding?"
As for why it's not legal everywhere yet... I can't really accept the "Jesus" explanation, although I'm not a believer I have read the gospels and he was much more concerned with worldly materialism, greed, and what he saw as corruption of the (Jewish) church. It's not Jesus so much as how these people have taken a twisted view on the things in the bible. But that can be said about all fundamentalists.
Japan hasn't legalized either. Most people are not religious there, but they still manage to find excuses to be upset about something that ain't no business of theirs. Of course, the standard bearers are the same people who revere Mishima (who was bisexual, really leaning heavily toward the male-male side). Hypocrisy is a universal language.