I think a lot of Republicans are not anti-gay personally (love the sinner, hate the sin). I also think I don't want people tinkering with the Constitution! I just don't see why the state needs to get involved with marriage period, it should be for religions to decide. The state should give everyone a civil union, and then each church could give or deny a religious ceremony as they please. Otherwise it just focuses people's attention to this one, relatively minor social issue, instead of larger issues of national security, budget, etc.
Now to go wash out my mind, to clean off the stench.