In a letter from Gavin Lewis (19 September), in response to my article on the chanting of the word Yid at football matches, he claims my opinion has no worth because, in Fantasy Football, I was made up as the black footballer Jason Lee, and this was clearly racist. So, Robert Downey Jr can have no opinion on racism; Matt Lucas and David Walliams can have no opinion on racism; Kayvan Novak can have no opinion on racism; Harry Enfield can have no opinion on racism; Leigh Francis can have no opinion on racism. That aside, let's say, Dr Lewis, it was deeply, deeply wrong. Perhaps it was. But I believe two of them don't actually make a right.
David Baddiel
London
• This prompts the obvious question: when will we challenge the use of the – disgusting to most of us – N word, ubiquitous in rap?
Pat Bolster
Bristol