No doubt I will be burnt alive but this but I feel strongly about it so I'll say it anyway.
I think that racist comments are no worse than any other words intended to be offensive.
If you get into an argument with a Black Frenchman who weighs 400 pounds and wears glasses calling him a Black Frog

is in no way worse than calling him a Fat four-eyed

. The words are simply meant to be descriptive in an offensive way. You are meaning to be nasty and hurtful and offensive but you are in no way implying that you hate other french/fat/black/spectacle wearing people or that people who fit those criteria are inferior. You are being equally bad in either situation. Yet if you shout that at a football match 1 will get you thrown out and banned and the other may get you a stern glance from a steward or copper.
Stamping racist discrimination out of football is a great thing, it shouldn't matter what colour your skin is you should have exactly the same chance of playing for a team as anyone else of your talent level. That isn't what this is about though.
The same applies to other taboo forms of abuse. If someone calls me a cripple in a nasty way its no different to calling me an ugly four eyed git. If anything the later is more offensive because I know I'm a cripple but I may not consider myself ugly. Call someone a thick

or a Black

you may well find the former is the most offensive because its pretty obvious to the guy he is black but may not think of himself as thick. Yet again if someone shouted these to me at a football match (the cripple thing I'm not black) one would come with severe consequences and one wouldn't. That’s completely wrong imo the person is trying to be equally offensive and hurtful both ways and should be treated as such.
If anything I think the "I hope you and your family suffer a painfull death" is a worse insult than "you are son of a terrorist whore" as one is just an insult and the other is hopeing something terrible happens to someone. Yet no one cares if Matterzi said the first but if he said the second hes in all sorts of trouble.