Xenophobic UK politician ranting about "political correctness" gets a public spanking from an historian

If that’s the case, and the production is similar to the play Hamilton (on Broadway), i.e. that it is overtly ethnicized and it’s clear to all, then by all means. There’s nothing wrong with the casting.
But if she is the only one in the production that is off-cast then it brings up valid criticism. Thank you for correcting my misunderstanding.