What's Mallard raving about today?
This is vintage Mallard.
First you have the amazing self-absorption inherent in assuming everyone knows what bumper sticker he is referring to, you know, the one that pisses him off so much.
Next you have the carefully-chosen detail that the sticker is to be found on Volvos, which I assume is code for something, but I am not privy to his fevered imagination, so I don't know what. But let's assume that in Mallard's world, Volvo's entire customer base is Liberals, the French, or Liberal French people.
Then we have a murky juxtaposition between that sticker and the Chinese Olympics. Though the parallel is impenetrable.
Finally we have the delusion of grandeur, in which Mallard appears to be making an utterly futile call for a boycott of the Olympics. Modeled no doubt after Bill O's famously effective French boycott.