"Schiavo wants to marry the mother of his 2 kids in Catholic church. Can't do that if the current wife is alive and divorced."
Since Michael and Terri had no children, he could have had the marriage annulled by the church. Not good enough - why? The problem for him is that he doesn't want there to be any chance that she might ever be able to talk and thus implicate him how she came to be in this condition.
"I will tell you who the villain is here, Satan."
Excellent root cause analysis. The ol' Prince of Darkness must be rubbing his hands together with glee right now, along all his liberal co-conspirators.
The annulment wouldn't work for him because he testified in the malpractice suit that he intended to honour his marriage vows and care for her for the rest of his life. "Remembering" in 97 that she'd want to die was his only route.