Klan hoods and robes are part of our history too. Maybe they can dress their serving staff accordingly?
Absolutely. Is it a free country, or are we to be ruled by witch hunts and political correctness?
We're currently living in the age of the latter - it's a repeat of the 17th century with the witch trials. Perhaps someday like the former era we will grow out of it.
I imagine this business is ruled by forces in the market. So sure they're free to dress their serving staff accordingly, but the market might take a dim view of it and their business would likely suffer. And if you want to condemn witch hunts and political correctness for that as well then you are certainly welcome to.