"Surely a young burly footballer is made of stronger stuff than to be physically or mentally disturbed by a bit of name calling, I am certain he can give as good has he receives. "
He maybe can, but this is about more than this particular instance. It's making a stand against the sort of violent verbal abuse, often backed up by more sinister activity, which has been seen to plague football and outside it.
John Terry may not even be a "racist" in the BNP sense, I don't know, but the language allegedly used was of a nature that is now unacceptable in our society. I'm actually quite glad that it's unacceptable. (I never thought I'd be offended by Bernard Manning, for example, until I actually saw him "performing" and I'm not even black.)
As I said elsewhere, John Terry's defence is not very convincing, although I can't obviously say for definite that he isn't telling the truth, but if if turns out that he isn't it'll be a lot worse for him than for the Liverpool player Suarez, who at least admitted it.