And my point has always been that her wishes were made clear when she voluntarily married him.
When my wife and I married, we became one. Therefore, if I am unable to communicate my wishes, my wife speaks on my behalf. Anyone who intends to put asunder what God joined together will need to have overwhelming evidence to have any hope of doing so.
Since when is marriage a license to kill?
I've never heard anything resembling what you assert, but you aren't even getting the point. The Schiavo case is indeed a life issue because it was about when a person gets the right to decide to kill a living person. If it were just about a person with no chance to live being disconnected from machines, there wouldn't be an argument. That's not what this is about; it's about euthenasia. It's a much bigger issue than your personal views of marriage.