The latest trend is to cast minorities in roles where one would expect a white person, for example, a period drama set hundreds of years ago.
It's confusing, because everyone treats the minority like he's white so we have to start pretending he is.
When servants show up, it gets even more confusing, especially if they're all played by minorities. One expects servants to be minorities so these are "real minorities" as opposed to the minorities playing white roles.
Then the issue of women's position in society crops up because women are still second-class citizens, but apparently minorities aren't. Unless one supposes that the minority playing a white person is "white" in that world.
I understand they want to have jobs for minority actors, but really, this is very confusing.