A (white) friend of mine works in an office of 5 women. Three of them are Nigerian and refuse to speak English when talking among themselves. One of them is the manager. When she wants my friend or the other (white) female worker to do something, she snaps her finger at them. When they complain to her about the finger snapping and the talking in their own language, she 'sucks her teeth' at them. This is a large organisation. They both went above her and raised a complaint and you'd never guess what they were told. They were told 'it's part of their culture and you have to accept it'. One of them has handed her notice in, the other one is looking for a transfer to another department.
Can you imagine if it was the other way around? The ellals of this world would be up in arms.