Before y'all start
If someone with Coprolalia had a tic to shout "let's fuck" whenever they saw a child, we'd rightfully be taken aback. Maybe forgiving after having the disorder explained but hard to say for that kids parents.
I use this analogy because for some reason when it comes to Black people, people forget we're humans with ongoing racial history and slurs are always harmful and always offensive especially in a highly public event.
He should apologize directly to the Black folk that were impacted, not to the general audience who couldn't give a damn that he said hard R - they can keep the general apology.

Censoring racial slurs.
Censoring facts that make fascists Big Mad.