At the risk of being serious...
On the general subject, I think there's an enormous difference between what language people use amongst themselves (rapping along to tunes or amongst friends who know your behaviour as well as your use of language) and what is used via a medium which touches millions of people, the majority of which don't know their true attitudes, like TV, movies, twitter et al.
Having said that I think this specific issue came to light in totally the wrong way, and I think that has an impact on his level of public crucifixion. If, at work, you have a problem with something someone says then:
+ You take it up with management.
+ If you think it's been brushed under the carpet then you have a right to go over their head and seek out senior management.
+ If that is brushed under the carpet, you have a duty to go to official bodies or to the media and leak information.
This is the spirit of the public information disclosure act. It's a last resort to right a wrong and not a tool to grind an axe against someone WITHOUT making any attempt at all to use the proper channels first. No one has mentioned the complainant has tried to report this correctly in any way before leaking to the press. This is flat out wrong IMHO.
Also when you're making a TV show or Film there are many takes, not all of these are a good idea or will see the light of day. To give an example, if an actor like Will Ferrell did a dozen takes of a scene an some of these were hugely inappropriate to include in the final film, for reasons of race/orientation/gender inequality, no one would hold it against him for pushing the limits of taste and decency, and he wouldn't face this kind of scrutiny. Equally, although Clarkson isn't an actor, he very definitely has a Top Gear character which he uses and I personally think that doing a take which is not appropriate for broadcast is part of him doing the "Clarkson" and there's a reason productions are edited before distribution.
If anyone who worked on set who witnessed that had an issue, they have every right to raise it, just via the correct channels first, then to the meida as a last resort - not as the first point of contact. If Clarkson had refused to do other takes and insisted this go out to the world, it'd be a different story.