You need to accept that it really happened.
Robson dropped Keegan from the England squad and when he attended the next match at The Landfill, he received abuse from the crowd, not one or two, but thousands. He was jostled and spat on, but took it all in his stride. People are now trying to pretend this never happened as Robson is regarded as one of the few gentlemen of football, and this type of behaviour shows mags up for what they are.
You probably have no recollection either of the time at Chelsea a few year later when loads of mags hurled abuse and spat on the disabled Chelsea supporters and their carers.
All clubs have idiots, but don’t try to rewrite history and claim your lot are innocent.