It's not that outrageous, it's not centuries, but yes, it's racist.
A "white only" performance would have triggered outrage and comparisions with those "centuries" (whatever that means) of racism
The USA has 245 years of unabated racism underlying its culture. That is literally centuries, no need for scare-quotes or disingenuous dismissal of the claim.
This is a single performance art piece. Get over it.