It is worth thinking about that all your reference material is rather old, Larry, and evidently some of it mistranslated. Here's a better take on this all: No one in the gay marriage movement is advocating someone marrying an animal, or marrying multiple partners, all of which I think you implied. Civil unions don't confer all the benefits of marriage, or none of this would be an issue.
Although I have gay family members and friends, I'm not gay. I don't pretend to understand how they feel, but there are a lot of things in the world that I don't understand. What I DON'T do is that I don't judge the things I don't understand, and I don't root around in texts of antiquity to find justification for dumping on things I don't like. My view of the entire gay marriage thing is that it's about child-raising, and my gay friends tell me the same thing. Anything that provides more stable homes for kids I consider beneficial to them to to society as well.
Essentially the debate is already over on this, Larry. So you have a choice- declare it irrelevant to you and stop worrying about it, or keep fussing about it and slide backwards into oblivion along with everyone else who thinks there's still a discussion going on. My view is that the discussion really ended a while back. Time to argue about more important stuff.
As far as politicians, they'll whore themselves out to anyone who votes. Because the tide of public opinion has shifted on this, with most Americans in favor of it, the GOP is climbing on the wagon along with everyone else- just like they are with the immigration question. All politicians care about is donors and votes- which works out nicely since they need donors to buy votes.
I don't understand being gay any more than I do parachute jumping, something else I have no desire to do. As long as no one puts a gun to my head and tells me to marry another man or jump out of an airplane, I'm good. If someone else wants to do it, fine.