United Nations Watch's Hillel Neuer says there is a double standard when it comes to talking about race.
This comes after Whoopi Goldberg was suspended by the ABC in the US for saying the Holocaust was not about race.
"When something in the past few years has been said by a celebrity that remotely has been seen to be pejorative against blacks or gays or women, or certain other minorities, they've been fired immediately," Mr Neuer told Sky News host Sharri Markson.
"This ought to be a teachable moment which is that there is a strange discourse in America about race."