What history books do you obtain that gem from? Feeding tubes are a very recent phenomenon.
God's will was thwarted by the refusal of the Schindlers to allow it to be carried out. TS would have been dead a decade or more before without their intervention. But they kept her in a living hell for all those years.
There was no "murder" except in the warped minds of those who fear death. The only blame here is on one who starved herself into a physical collapse. But that is sooo inconvenient to the Martyr seekers.
Presumably in your mind the physician who works to save those with a chance to live rather than waste his time on those without a chance is a "murderer" too.
Michael Schiavo, 1/2000 Direct Testimony: states bulemia was never proved see p 27. (large file)