The first quote is from Kinderman et al:-
such approaches, by introducing the language of ‘disorder’, undermine a humane response by implying that these experiences indicate an underlying defectHere the authors of the quote are arguing that mental health problems should not be seen as disorders or pathologised, as they are better seen as understandable responses to difficult circumstances. I do understand what the authors are saying but I have commented before that such a way of viewing mental health problems may be potentially misleading (eg. see previous post). Generally the implication of identifying a mental health problem is that the person's reaction has been maladaptive. This is why the person has gone for help.
Although there is this debate about whether mental health problems should be seen as illness or disorder within the critical mental health movement, I don't see how this quote supports Bell's argument that people with brain disorders are being demeaned by a critical mental health approach. The quote is not talking about people with brain disorders - in fact, it's saying that mental health problems are not brain disorders.
The second quote that Vaughan Bell gives is from Mary Boyle:-
The idea of schizophrenia as a brain disorder might offer further comfort by distancing ‘normal’ from disturbing people. It may do this by placing disturbing people in a separate category and by suggesting uncommon process to account for their behaviour…Bell seems to have problems with the idea of "distancing". What Mary means is that reducing mental health problems to brain disease may be a way of protecting others from the pain the person is experiencing. Surely this is correct. Again, this quote isn't about people with brain disease.
The third quote is from Lucy Johnstone:-
The fifth category… consists people suffering from conditions of definitely physical origin… where psychiatric symptoms turn out to be indications of an underlying organic disease… medical science has very little to offer most victims of head injury or dementia, since there is no known cure…Here, Lucy is talking about people with brain disorders. What she is saying is correct that medicine in the literal sense can't cure organic disease. What she goes on to say, which isn't quoted, is that behavioural and social interventions are what is needed. Again, this is correct and isn't being demeaning of people with organic brain disorders.
The final quote is from Doing psychiatry wrong:-
To be sure, these brain diseases significantly affect mental status, causing depression, psychosis, and dementia, particularly in the latter stages of the illness. But Andreasen asks us to believe that these neurological disorders are “mental illnesses” in the same way that anxiety, depression, bipolar disorder, and schizophrenia are mental illnesses. This kind of thinking starts us sliding down a slippery slope, blurring distinctions that must be maintained if we are to learn more about why people are anxious, depressed, have severe mood swings, and lose contact with reality.This quote is saying there is a difference between organic psychosis and functional mental illness, which is correct (eg. see previous post). Again, this isn't demeaning of people with organic brain disorders.