The intent is far less relevant than the effect.
I'd say that the effect should depend on the intent.
A black contestant of the show, Nick Sinckler, defends that performance:
"I can see them celebrating greatness that we've introduced into the world. If you can't see a difference between ridiculing/mocking and paying tribute to wonderful black artists whose music influenced the world... then that's your problem, not mine."
Source:
rozrywka.spidersweb.pl/twoja-twarz-brzmi-znajomo-2023-szmajkowski-humble-blackface-rasizm-polsat
something as inane as this.
There's nothing "inane" about this, considering this is the point of that TV show - impersonating singers.
So impersonate white singers or bring in a black contestant.
Why? If a man can impersonate a female singer on that show then why can't a white man impersonate a black singer? Here's that Nick Sinckler that I quoted earlier impersonating a female singer on the show - Libianca:
I somehow can't hear anyone in the West complaining about this :))
But I suppose a man pretending to be a woman would offend RuSSian sensitivities this time lol 🤦