Every workplace I have worked at, they've had specific policies in place regarding denigration of people on the basis of their religion/gender/sexual orientation. A lot of workplaces would regard voicing an unpopular opinion on a touchy topic as unprofessional.
On Mundine, I'd have thought by now that everyone would have caught on to the fact that he will say whatever he can to get his melon in the papers. His hypocrisy knows no boundaries, particularly pertaining to racism, he was odds on to come out with something like this. For mine, it is far from surprising.