The most fundamental human right
In such a tragic case, the withdrawing of treatment is not the same as ending the patient’s suffering as it means the child is starved to death, because no one is allowed administer a lethal dose, which is past barbaric.
For those who object on religious grounds I would say, if there is a god, then I would hope that of all the people who will be met by the angels then this child is one. For those who object on medical grounds, I would say that as we have the knowledge to prolong a life only with machines, we must also use our knowledge to end a life by the most humane means possible.