Charles Foster Kane would have thought the last people to attack somebody over a botched joke would be Dennis and Callahan:

... You'll recall they are the geniuses behind the racist comments about Metco gorillas waiting for buses, but of course they say they were misintrepreted. So, since they're unwilling to believe Kerry was making a joke I don't buy their excuses either. Both of them are lying, racist, scumbags if one is to apply the same standard to them that they are now applying to John Kerry.