Derxa, we all know that the father was desperate to keep his son alive, but it would have been cruel to do so, there are times when you really need to just do the hardest thing for the sake of the child or animal. I see it frequently with animals where people see it as a declaration of their love how long they can keep an animal alive; that isn't what I view it as I'm afraid.
When my daughter was seriously ill with leukaemia as a two year old I had two greatest fears; one was that I would lose her, but the second just as great fear was that the treatment wouldn't work and would need to be repeated, and the treatment was far worse than the disease and it would have broken me to put her through that. I daresay I would have been classed as lacking in compassion or heartless by some for not wanting to fight if that had been the case.
I do feel for TE, he is going through hell, but I think if he could have just accepted the sad truth that his son would never be well things could have been so much different for everybody.