I don't understand how people can think a viable excuse / defence of his behaviour is that effectively "other people do it too"!!!
Other football clubs also having racist chants doesn't discount Millwall's!racist chants, Prince Philip's ignorant and racist remarks don't discount Danny Baker's.
If your child was bullied at school would you really say no harm done if other kids are bullied too?
Two wrongs (or countless wrongs in this case aka racism) don't make a right.