Florida law told Judge Greer what he had to do here. Once fate chose him as the judge in the case, he was responsible for following the law laid out by both the Florida Supreme Court and the Florida Legislature, all of which said that where those close to the incapacitated person cannot agree on what the ward would choose to do, then the court should resolve the matter. A steaming pile, that one is.
He had no right to 'resolve the matter' by issuing what was in fact a death warrant, ordering that she SHALL be killed.
He broke the fundamental law of the land; the Constitution.
And that act of lawlessness cost Terri Schiavo everything.