i think you have to imagine yourself as an american to understand how you could think the existence of AIDS is debateable. (hmmm that wasnt meant to sound rude... i cant really think of a better way, so that will have to stand). i'm not going to discuss the thesis, 'cause i dont think it presents any logical argument or evidence to argue against.
what i will say is that the american doctor-patient relationship is extremely different from that relationship in the UK. For NHS doctors, the vast majority of british doctors, there is (ideally) no commercial incentive for any diagnosis. even if there is influence from big pharma to prefer certain treatments, through conferences, support and marketing to health authorities.
In america you visit your doctor expecting to have to fight for the correct treatment. to have to assert yourself or be fed junk and taked for a ride. or to be abused and ripped off. healthcare providers in america are just as likely a source of disinformation as the biotech, tobacco or automobile industries
i can believe that the tobacco cartels withheld information on the dangers of ciggarettes. but i cant believe that a public domain research consensus could be hidden and corrupted in the same way.
i dont think that means i'm blinded by my faith in a religion called science.
but it does mean faith in double blind, constantly reviewed, competitive, evidence based, open research.