You've got the motivation all wrong. When the moral & sexual perverts get what they want, they'll drop the churches and their Christian facades like the athiests they truly are. Their motivation is to change the mores & morals of society in order to normalize their aberrant behavior. Then, and only then, will they be able to push through the laws that protect their behavior from formal social control. Some smart butt monkey, 20 years ago, realized that the only way to effect change in the moral fabric of society is to attack the source of that moral code....namely, religion. Any freshman undergrad taking Soc. 101 can see the diabolical logic of it. If we care to be totally honest about it, the lesbigays are not so much deserving of our contempt as are our fellow Christians who are so bereft of faith that they've allowed this plan to work so well.
Perhaps. I see the battle in more of a sense of not human agents (though they are the visible sign), but rather as the main battle between good and evil.
Furthermore, I hope not too tin foil-ly, I believe there is a concerted effort by power mongers in shadowy places to rid the Church of it's influence, in order to control a more docile populace. Marx said that religion is the opiate of the masses, but he was wrong. Modern marxists correctly perceive the true spiritual animation and activity of Christianity to foil their plans.
Gay rights is merely another battering ram and trojan horse for the weakening of the Church.