Godwinned. 
I would really, really like to move away from the 'omg homos lol' aspect of this--drop biology, drop religion--and just talk about the SECULAR LEGAL implications of this trial.
Anyone agree?
That's sorta the point. They had no real secular reason for it. That's why these guys are floundering on the stand. When asked why it should be banned, all they have is "ew gays"
The reason why it's an issue at all is simply that people want to live in a society that reflects their moral code. And there is nothing wrong with that. Marriage is a social structure before it is a legal structure, and as long as everyone agreed on what constituted a valid marriage there was no problem having a legal structure that enshrined the social structure. That consensus no longer exists, which is why gay marriage is an issue at all.
Since there is a legal structure tied into the social structure of marriage, both people in favor of advancing gay marriage and people against it are trying to use the legal structure to enforce their preferred version of the social structure. This was a social problem before it became a legal problem though, and, IMHO, a legal solution isn't ever going to really fix it. Either American society will change to the point where gay marriage is solidly accepted/rejected, or it will continue to be a point of division. This is a bit scary to me, because historically big social divides that people couldn't solve have led to either war or by emigration (e.g. the Mayflower). And we're kind of out of places to emigrate to...
I don't think either side has a right to enforce their view of marriage when it is now so far from being the consensus, so IMO the best bet for peace will probably be to get government out of the marriage business, at least by that name, at least until some sort of consensus is restored (if ever). It's not ideal, but I think it's better than the alternatives.
I also think it's important to recognize that this is a real division with good, smart people on both sides. Let's stop calling each other things like "commie athiest heathens" and "religion-deluded wingnuts."