As a GP, or in any public-facing role, you are going to be dealing with people who behave very badly, in ways that you will find upsetting or personally insulting. And that must be particularly the case for medical settings, where patients are very anxious and also bringing lots of baggage and projection to the encounter
So learning to deal with situations where people are being abusive to you is part of the job description. Presumably if you are an openly gay GP, people will abuse you on that basis, and similarly female medics will get sexist abuse, and ethnic minority medics will be exposed to racist abuse from patients. None of that is acceptable, but you have to find a way of managing your professional reactions without being abusive in return
This argument is a stretch, IMO. Firstly there is no evidence that AH has ever responded inappropriately in a clinical setting. He has worked in A&E and, if he is perceived as gay IRL, I can promise you that he will have received homophobic abuse from patients, sadly. We have no evidence that he has ever been unprofessional at work. As part of the GMC investigation, all current and recent employers will have been contacted so, if there had been incidents of bad behaviour with patients, the GMC would know, but there are no allegations to this effect.
Secondly, it just isn't the case that every doctor who is an arsehole in their social/professional life is an arsehole to patients. As discussed in the first thread, doctors tend to have a professional persona that is different from their non-work persona.
Thirdly, we're doctors, not saints. Yes, if a patient insults us at work, we have to behave professionally and not insult them back. But we are entitled to behave like anyone else in a non-work environment, as long it doesn't cross the threshold of bringing the profession into disrepute. That threshold is rightly fairly high. If we suspended every doctor who had ever been rude to a friend/acquaintance/stranger outside of a work context, on the off-chance that he might go on to abuse patients, we would struggle to staff a single GP clinic.
AH is not in front of the MPTS because people on Twitter threw some insults at him and he insulted them back. Nor should he be.