By the fact that an actual incidence of racism elecits this from you:
Whereas Ferdinand suggesting that there might be prejudice at large in the football world elicits a condemnation as "quite disgusting", how you're "frankly sick of having to see the world in 'colour' terms all the time", and the repeated invocation of an impassioned, and vaguely biblical, language of besmirching, sullying, tarring etc.
Well I shall remind you of that next time you go off on one about some celebrity or other, maybe a footballer, or an actress who smokes, or something.
And mud doesn't gestate
Yes there's been a lot of hype but there's always a lot of hype. There was a lot of hype about Hatton, and he bigged himself up like all boxers do, and he got taught a lesson. Khan's no different from any other boxers, yes there was loads of hype but if anything he seems more humble than most.
The reaction was over the top, maybe due to traditional British envy of success, maybe, especially in the current climate that you seem to be wishing away, due to something more sinister. I think the latter, and have no qualms about mentioning that view on a football message-board when it's under discussion. I'd be more circumspect, and look to back up my view with something more tangible than a feeling, if anyone's actual reputation was at threat, but, as with the Ferdinand case, it isn't.