That's bollocks, you can hurt a fat person as much by taking the piss out of him for being fat or a ginger kid for being ginger. Why is one fair game while the other isn't? I'm neither by the way so I'm not biting.
Err the history of the world, subjugation of blacks, slavery, colonialism, discrimination, apatheid...Need I go on. Don't be silly Mick. It's not quite the same as being ginger or fat is it?.. What ST did is classic latent racism...Oh it's just a joke a bit of banter.
If this was America his career would be finished.
edit as Nobby said.