Maybe its the attacks by Savage on him.
Could be. I don't listen often enough to be familiar what you are referring to. I guess I heard Savage refer to Rush as "The Golfer" once. Savage has a lot more uninteresting (to me) cr@p than Rush does but I did think this appellation was cute and made the point that Rush spends a lot more time talking about puffery these days. Of course this has been true for years now. (See: John Switzer's goodbye, particularly Reason #2, which dates back to 1995.)
But lots of people criticize Rush, and sometimes he handles it brilliantly as was the case with the Reid letter. The CAIR attack on Savage isn't just an attack on Savage but on all talkers who sometimes say things that are not quite politically correct. Certainly Rush knows this. He has to care about it, and so I'm surprised that he hasn't commented.
ML/NJ