You didn't put enough in bold:
"Michael Schiavo, as the guardian of Theresa, invoked the trial court's jurisdiction to allow the trial court to serve as the surrogate decision-maker."
And the court followed the directions of the legal guardian. It's not just a fine hair to split, as many people here equate this decision to the government just coming down and sentencing someone to death. It isn't. This is the work of one evil man, Michael Schiavo, with the law as written on his side.
This reminds me of discussions with people who say our laws are based on the Bible's morality. They are not, they are not necessarily moral or immoral. As you can see here, using the power of the law can result in a very immoral act.
The court is the arbiter and ordered the removal. That's the fact, you can deny it or accept it. That's up to you. Precedent has been set.