Your opinion is one that mirrors the ones of most football journalists right now who feel Chelsea made this complaint out of spite and revenge etc. for Clattenburg's poor officiating performance which cost us the game.
Obviosuly all those 'Journalists' fail to mention how Chelsea actually hired independent lawyers to rigorously interview the Chelsea players involved to ensure that these serious claims were backed up by sufficient evidence before they made an official complaint to the FA. It was also another reason why Chelsea FC. have only accussed Clattenburg of racially abusing Mikel and have dropped the part of him insulting a Spanish player due to lack of evidence.
Also I doubt the club would make such a serious complain simply out of spite especially at a time when it is working hard to rebuild its reputation after the Terry racism saga and present a better image to the public. So yeah this Clattenburg racism saga looks pretty serious to me since the club have decided to press ahead with the charges...
This is what I'm talking about. You did not express any of this reasoning when Terry was caught on Video! Thats even more evidence than is so far apparent in this case!