lol
The fact that you see yourself as a moral crusader could be part of the problem. Gay people aren't "sinners", out to destroy society. They are society. Apart from a few highly activistic gay rights campaigners (and who can blame them for hitting back?), most gay people are just trying to get on with their lives in their own way, like everyone else.
You might as well declare a crusade against people with perms for all the moral superiority that's involved.
We've already discussed that in the heated depths of "Sanctity of Marriage". Religious arguments for morality in biology make no sense.
This condition is not unique to church-goers. It's a sensation experienced by everyone when we encounter something that breaks our model of 'how things are'. You'll get over it.
This thread is not about gay marriage. You want "Sanctity of Marriage", where these questions are already addressed (and, iirc, in other threads too).