I think, to be fair, that you don't know what you don't know, and many of the CA posters will be posting out of their genuine ignorance of medical facts.
That doesn't excuse the manner in which they are posting, but I do think it's unfair to sneer at their lack of medical knowledge, because they aren't medically trained. They are just people who have been sold a story of David and Goliath, and in Britain, who doesn't root for the underdog?
Mass hysteria is a known phenomenon and this is a true example. It's a run away train of cognitive dissonance and the CA crew are now so invested emotionally, in their time and financially, that they cannot now alter their position that Charlie is a fighter and will overcome, so all they can do is further deepen their position that GOSH have got this wrong. The medical facts aren't helping that position, so they've had to turn to claims of ideology - GOSH want to kill him to hide their mistake.
It's desperately sad and a lot of people will suffer hugely at the end of this, not least of all Charlie. I feel for the staff who must be dreading work each day, and the managers who must be agonising over who to allocate to his care.
I hope the right decision is made on Thursday and that if made, GOSH find a way to carry it out. The patient should never come second just because the relatives are proving difficult.