They comments are pretty worked up but I'm not quite sure how this is even considered racist.
Unless there is some reason that I don't know that black people need to have long hair it sounds like everyone is being treated equally. It's not like they are asking him to shave with pseudofolliculitis barbae.
I feel this is one of the big concerns around cancel culture. I said all types of stuff growing up as a millennial that was fine then, but probably wildly offensive in the future and not great now.