Fair question RedRuth. The anger and suspicion that's been directed at researchers like Myra McClure from some sections of the online patient community, for example, must come as a real shock, and some of the (alleged) behaviour is hard to explain or justify. But there are good reasons why this is happening.
I would say that this phenomenon ought to be a real wake-up call to the scientific community, indicating the extent to which the historical problems around the management of ME research in the UK, by psychiatric researchers, are now causing many patients to begin to lose faith in the integrity of the scientific community as a whole. I think scientists need to understand one fundamental point: any anger of the patient community against medical researchers is wholly because they
don't investigate ME, not because they do - and really that anger is directed almost exclusively at the psychiatric researchers. Medical researchers genuinely investigating ME would be welcomed with open arms - that's exactly what we are crying out for! - and such people do experience the other side of the story spun in the media: the extraordinary warmth of this community towards those they trust. But it is also true that medical researchers attempting to replicate positive biomedical findings from the US, using Wessely-supplied cohorts, and UK definitions of 'CFS/ME', and then failing to replicate those positive findings, thereby appearing to nip any progress in the bud under dubious circumstances, are likely to run into a fair degree of mistrust.
Maybe the best answer to your question is to note that the controversy over XMRV really has its roots in the 1980s, when Elaine DeFreitas first discovered a retroviral connection with ME. The failure to replicate those results, and the apparent closing down of any research into retroviruses and ME ever since then, was already a controversial issue even before XMRV came along. Osler's Web documents that period, which was a pivotal period in the history of ME: the illness was psychologised, Gulf War Illness Emerged, the term "Chronic Fatigue Syndrome" was coined following the Incline Village outbreak, the definition of "CFS" was broadened in a way that obscured the much tighter historical definition of ME, DeFreitas found evidence of a retrovirus but the CDC and a couple of other teams failed to find it and the research was closed down, and Professor Simon Wessely emerged, all in the space of a few years. The circumstances around these events, and the recently partially-disclosed secret files about them, give further grounds for suspicion. And the nature of the management of ME since then, as a psychiatric/somatisation disorder, with the insurance industry entangled with the psychiatric researchers, is what has spawned so many conspiracy theories attempting to explain the way that ME/CFS research has been controlled.
In the case of Myra McClure, for example, her paper dismissing XMRV was produced in collaboration with Professor Wessely (providing the patients) and she hails from the same institution (Imperial College), I believe. Wessely's patient cohort isn't trusted by the community as a genuine ME cohort, especially since he favours the dramatically looser Oxford definition rather than the Canadian Consensus Criteria, and McClure was seen as tainted by association. McClure's ill-advised and illogical comments, including the infamous claim to be "1000% certain" and the suggestion that XMRV may be in the US but not the UK, together with the speed at which that first negative paper seemed to emphatically deny the existence of XMRV, without replicating the WPI's methodology, all fueled that disrespect.
I'm sure it's all very hard for regular scientists to understand where such a culture of suspicion and mistrust is coming from, but really, I would implore those people to consider that the origin of this mistrust is
not with some characteristic of the patients themselves, but rather is a consequence of the way that ME has been managed historically. I think it's quite understandable that any claims sounding like conspiracy theories are going to just sound nuts to researchers who trust their peers' integrity. But equally, the patient community has no reason to trust any researchers associating with Wessely et al, and no evidence to cause us to assume that all the researchers involved can be trusted to investigate fairly.
It also seems relevant to note that Dr Mikovits herself is a retrovirologist, and Drs Alter, Lo and Ruscetti are all respected (retro)virologists - there is clearly disagreement amongst the scientific community here, and much of the patient community has tended to side with those researchers they trust, and with those who are working with reliable patient cohorts supplied by those researchers, because these are the people we trust to accurately represent the ME community in their research. It seems likely to me that several innocent retrovirologists who have searched for but not detected XMRV must have been bemused to have become embroiled in controversy here. But the failure of the first few research groups to detect XMRV was widely predicted here, by those who feared a repeat of the DeFreitas controversy (and it didn't help when the one (Swedish) retrovirologist who we
did trust died in a car accident). So the community in the UK, in particular, was already primed to doubt that there would be fair play here.
Finally, I'd highlight one fundamental argument that should apply to any sceptic who demands "Evidence, or STFU". Any suggestion that smacks of conspiracy, or that questions the integrity of researchers, can be dismissed as absurd by scientists who know their colleagues and trust them all implicitly - but such people ought to note that there is in fact no evidence to prove that some researchers are
not corrupted, and from a perspective further away from the scientific coalface, given the immense financial issues involved (one reasonable estimate has it that over a trillion dollars could ride on the outcome of the XMRV issue), it seems not unreasonable that this assumption - it is apparently an unquestionable assumption - of the integrity of the researchers involved, may be open to question. And even if the retrovirologists and other biomedical researchers themselves are honest and unbiased, there is still plenty of opportunity for the corruption of their research by influences such as supposed "CFS experts" such as Wessely providing cohorts and blood samples. It simply has to be accepted that the patient community does not trust Simon Wessely and that situation is very definitely not going to change.
With all of this, I don't mean to excuse or justify any questioning of the honesty of researchers like Myra McClure, and certainly I'm not condoning any alleged threats of violence in this regard, but I'm trying to explain why the historical and political context makes this situation entirely understandable. Hope that helps.