Slop.

Him saying the slur is not evidence of his racism. The disability does not force him to vocalize things he subconsciously thinks, it forces him to vocalize things he finds abhorrent and wrong. This is also why he's not calling white people "slurs" as some people have mentioned, because he presumably doesn't think those are taboo because anti-white racism isn't real (correct).

Now, the harm that is done to the black people who were on the receiving end is of course still real. But if this discussion starts with "why should being disabled cancel out being racist" it's fundamentally missing the point of one half of the equation (ableism and disability) and it's not going to accomplish anything.

I also find it extremely troubling that the broadcaster who got to farm controversy by inflicting these slurs on millions of black people while scapegoating disabled people and censoring "free Palestine" is now completely getting away with that while the discourse turns into a war between disabled people and black people, which are of course not at all mutually exclusive categories.

Knowing a word is racist, harmful, and inappropriate does not make you a racist. The very same reasons we find it offensive are the reasons he shouted it.

Say someone’s colostomy bag broke in public. It smells like shit, nobody likes the smell of shit, the person with the colostomy bag probably doesn’t like the smell of shit either. Would you find it appropriate to say “this person loves the smell of shit, they intended to make us all smell their shit?”

that's not how tourettes works

Having the "Say the worst thing possible" disorder is actually not racist.

He has a form of Tourette’s that literally forces you to say the worst possible thing in that moment. He has called the Queen the C-word to her face and said that he has a bomb in a public crowd.

Obviously the two people he said the word to (and every black people who saw the event because the BBC care too much about views to censor the incident apparently) have the right to be upset that he called them the word, I’m not disputing that at all. But this form of Tourette’s is essentially like the intrusive thoughts some people with OCD get which is in no way representative of them as a person.