When someone like Palin says "being gay is a choice" you say "maybe, what's your point?"
The point here is not whether it's predisposition or lifestyle choice. I think (I hope) we all know that, within the breadth of our community, it is and can be both. The point is not to surrender our definition and identity to the likes of her!
They are trying to invalidate all our choices of sexual expression, and it is not a good idea to go scurrying back to the 'safety' of "it's genetics/I can't help it/God made me this way". That may look like a good bastion, one that uses their own arguments against them, but what it really does is let them define us. It sacrifices any and all choices, allows them to say freely and without contradiction that our choices are invalid, because we have failed to defend them, even the theoretical ones, even the ones that some of us don't make.
Our choices are not invalid! Neither the ones made at the prompting of biological predisposition or the ones made on the basis of intellectual predisposition are invalid, stop letting our enemies say they are!
This is a wedge that I thought we'd recognized for what it is, and gotten over at least a little. It distresses me to see it cropping up again every time I turn around. Let's take back our political savvy, here, people.