I think one of the most important aspects of this deabte is to believe in the value of another person's opinion, sincerity, and motivation. As unnecessarily harsh as some conservatives can be about legal rights, gay activists can be just as bad. The virtue of caring about equality does not make up for dismissing other people's priorities.
There is very little effort made on the part of gay rights’ activists to understand the anti-same sex marriage position.
The issue of gay marriage is an interesting crossroads, though, because it makes the private lives of others a PUBLIC ceremony, or rite,--marriage. Marriage has several components that make such redefinition problematic. I think for many people the most important is simply the inevitable shift in our culture and national scenery that acknowledges and accepts, to an unprecedented level, the normalcy and validity of formally making a spouse/mate of someone who shares your gender. Shares your gender and the sisterly/brotherly charactereistics of relationships among people of the same sex--that are in part DEFINED by being Platonic. There is undoubtedly an incestuous feel about this to the uninitiated. I suspect that is the more specific answer you would get from someone who says something like, gay marriage "just doesn't seem right." I do not support gay marriage, almost entirely for religious reasons. I believe that marriage is more than than a civil arrangement, but rather ordained by God, and very firmly and deliberately designated to opposite-sex mates. For me to condone or recognize as legitimate the marriage of two men or two women would be to show disrespect for God and to redefine what is good and acceptable on my own, without regard for the standard that I am convicted by God to hold up for myself.
Now, all of these thoughts and beliefs are personal to me, and are not necessarily a part of the larger society I live in. There are many ways of being immoral besides the particular situation of being sexual with a member of your own sex, some of which are common among us and have been accepted in our culture for a long time. (We have to tolerate others so that they will tolerate us.)
The issue isn't really that some clergy need to have their right to discriminate protected, but that the public in general is now being forced to move beyond 'live and let live,' and potentially acknowledge the equality--not of people--but of heterosexuality and homosexuality. We may balk at that for different reasons--and maybe some will change their minds--but that is the issue of equality at hand. I don't have any problem challenging that equality--in fact, I would be reluctant not to. I understand that some of us--maybe up to 10%--are born with a different sexual orietation than man/woman. What I disagree with is that our sexuality defines us, or identifies us to the extent that we cannot separate our behavior with our inclinations. This applies to everybody. I don't think straight people having sex when they're not married is right either.
Why are some people born gay if marriage is only for opposite-sex mates? I have no idea. Refer to my last paragraph.