Personally, I think its 100% unfair to judge the guy unless you've been in his situation. What's he supposed to do, put his life on hold for 15+ years when there is no hope that she's gonna snap out of it? Plus, how do people know that she really didn't say she would want to be put down if she were in this situation? They don't, and its left up to her husband because they were stupid and didn't create a living will. And to the morons saying he should just divorce her and leave the decision up to her parents: if she did say she would want her life to end, I don't fault him for trying to make her wish happen, I commend him for it and for not taking the easy way out.
My fiance and I are doing our living wills this summer. I want to know that my decisions are final, and some politician isn't going to change that if I am ever on my deathbed in the same situation.