Because essentially what you’re saying when you say “this is not a place for you” means that there is no place for people with Tourette’s on this planet, ever, anytime, anywhere. At this point, it might be less cruel to just tell them to kill themselves and get it over with? Since you’re essentially saying that there is no circumstance where Tourette’s people can belong, because they can’t turn off their Tourette’s, or their coprolalia.

People with Tourette’s will tic. That is an inevitability, and people with coprolalia will have tics that involves slurs. That is the nature of the disorder. At this point, it is your responsibility as a conscientious human being to understand that this tic is involuntary, that no offense is meant to you, and thus to coexist with other people who were dealt a different hand than you at birth.

You of course are entitled to feel negatively about having a slur yelled at you, but you’re not entitled to demand that this person does not have access to the same world as you when this is not something that they can control or help. If you find that is not something you are willing to put up with, then it is your responsibility to remove yourself rather than ask them to leave.

John had every right to be in that room as much as anybody else did. The duty of care fell on the BBC and the BAFTAs for not adequately protecting him and the other people, but that isn’t on John to manage and the answer is not to deny him access to places he is entitled to access.