One other issue I see with this altercation is a public presumption that Chris Rock was purposely or at least knowingly making fun of her medical condition. Until/unless Chris Rock says otherwise, it seems to me that it should be presumed that he was making a joke about her shaved head looking similar to Demi Moore's character's shaved head in the movie G.I. Jane and nothing more and literally having nothing to do with her medical condition.
A similar situation in my mind would be a boy with Tourette Syndrome out with one of his dad in public. Perhaps the boy blurts something offensive and a bystander reacts by saying: "Who are you, Andrew Dice Clay (or any other comedian known to be offensive)?" Then the dad punches the bystander's lights out. The dad is reacting (incorrectly) to the comment because the dad knows the son can't help it, the son has TS. The dad was offended by the bystander's remark and felt that it was a verbal attack on his disabled son. However...the bystander had no idea that the son had TS and was reacting to the words themselves and was not reacting to or making fun of the son's disability.
A similar situation in my mind would be a boy with Tourette Syndrome out with one of his dad in public. Perhaps the boy blurts something offensive and a bystander reacts by saying: "Who are you, Andrew Dice Clay (or any other comedian known to be offensive)?" Then the dad punches the bystander's lights out. The dad is reacting (incorrectly) to the comment because the dad knows the son can't help it, the son has TS. The dad was offended by the bystander's remark and felt that it was a verbal attack on his disabled son. However...the bystander had no idea that the son had TS and was reacting to the words themselves and was not reacting to or making fun of the son's disability.