I was not happy with my dentist - so I went to a different one.
The doctors sound like megalomaniacal pricks. Why shouldn't he consult a different doctor, and pay for proton treatment - If other countries recognise it as effective and have facilities for it, why shouldnt he spend HIS OWN MONEY to get it.
British doctors also tried to prevent parents getting three separate immunisations for measles mumps and rubella. (A choice available in the US and other countries)"You will have all three in one jab, because we want it that way" effectively.
At least in the US he could have just got his son admitted to another hospital, and choose a pediatrician who will discuss things. A patient is not the personal possession of the doctor treating them.
The issue here is freedom of CHOICE. If the family were Sikh or Jewish or Muslim would people on this site be ranting about their faith?