Sophable, I think you've got this the wrong way round. Southall is an extremist who has been conducting a witch-hunt against mothers for years. Now he's been exposed. He has been wielding massive power indiscriminately. To try to pain him as the victim is just a reversal of the real situation.
This is the man who ran a very controversial experiment on a new incubator for prem babies that denied them oxygen. And ignored all criticism from within his profession about that. He also ignored all objections to covert video surveillance, chiefly that if the parents involved were actually abusers his methodology was putting children in danger - using them as bait, if you like.
It has further been established that he was, at best, lacksidaisical about gaining proper informed consent from parents whose children were the subjects of his experiments. There is evidence that he used child protection proceedings against parents who refused consent - and once the children were under the control of social services, they were enrolled in his experiments. Highly dubious - if the child protection proceedings were valid, he should not have gone on to use the children in his experiments.
He probably did identify some cases of child abuse. Sadly he's ruined his own reputation by a massive, sustained lack of judgement. The GMC does not strike doctors off lightly - in fact there has been a series of attempts to reform the GMC over the past decade precisely because it is so disinclined to do this.
I know a former president of the GMC professionally. And he was convinced the MSbP/FII thing was taken to ludicrous extremes, having come across examples in his day job as a practising doctor.