I don't know why he couldn't have just let the parents keep their daughter as a vegetable for as long as they wanted. It just seems so cruel. He could have gotten divorced anyway, the insurance was paying for the hospital. Why couldn't he have let that poor family keep their daughter even if she really was a vegetable. It made them happy. And yes, I know she said she didn't want to be kept alive in that way, but she wouldn't have known the difference, and I bet if she had known how much pain it would have caused her parents to take out the tubes, she would have been happy for them to keep her alive.
I on the other hand would expect my dh to respect my parents wishes as well. I think that they, as my parents (and very good ones at that) deserve as much of, and perhaps even more of, a say in my welfare than my dh.
You might think that you will think that, but if it actually came to it and there was a chance she might be lying there in pain with no quality of life I'm fairly sure you would feel differently. On the unit in which I work it is very unsual for the relatives to disagree with the conclusion the doctors have drawn re, continued treatment.
I have to be honest and say I would be HORRIFIED if I knew that parents would try and override wishes which my DH was trying to carry out with the reasoningn "well she's our daughter".
When I married my DH, "we" became a unit together. HE is now my closest next of kin IMO, and knows better than my parents what my wishes should be.
Also - think about your parents, if they were desperately ill and had no chance of recovering and they'd said that they really didn't want to be kept alive artificialy or resucitated would you go against their wishes - because they're your parents and you want to keep them alive as long as possible?? I know I couldn't - I'm not saying it would be easy to let them go, but I'd probably feel guilty for a long time if I went against their wishes.
There was a case like this in Dublin a few years ago, the parents went public recently. It was the parents who wanted the tubes removed, with support of the family, but the state and hospital needed permission from the court. This was granted but most of the Churh was against the family. The outcome was that he daughter was taken home to die; I wonder would the parents in the Shiavo case have prefeered to take their daughter home? I hope the all find peace now.