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."
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 🤦