It is all of society's business to prevent cold-blooded murder. Have you lost your mind?
"there is no way a wife would order the feeding tube removed from a spouse who can communicate."
I don't know who wrote that above, but recent, and not so recent history has, unfortunately, taught us otherwise.
It is, indeed, hard for me to imagine how a man trapped in his own body must feel, knowing what he must know now about how his wife's feelings have changed. I wonder if he knows how severely they have changed. Part of me hopes not, but part of me hopes he knows so he can defend himself if he can.