You must be Catholic because I believe that faith in Jesus Christ is what gets you into Heaven.
You seem to feel that a marriage contract gives you the right, even, the obligation to kill your spouse if she is not in 100% perfect operating order.
I never said that and I never implied it. If my wife were to tell me that she'd want to stay alive not matter how damaged or destroyed her brain or body is then I would use all my power to fight for that.
What I am saying is that the marriage contract should determine where the authority in making the decision comes from. Not from the government, not from a judge, and not even from the family.
I am Catholic and as for the rest of your argument, What's the point in repating my answer? NO! A marriage vow does not give you the right to murder your spouse.
What kind of faith is that? Faith that Jesus Christ wants you to kill your wife? Catholics aren't the only ones who disagree with that.